2 Advanced Linux Sound Architecture - Driver
3 ==========================================
10 To enable ALSA support you need at least to build the kernel with
11 primary sound card support (CONFIG_SOUND). Since ALSA can emulate OSS,
12 you don't have to choose any of the OSS modules.
14 Enable "OSS API emulation" (CONFIG_SND_OSSEMUL) and both OSS mixer and
15 PCM supports if you want to run OSS applications with ALSA.
17 If you want to support the WaveTable functionality on cards such as
18 SB Live! then you need to enable "Sequencer support"
19 (CONFIG_SND_SEQUENCER).
21 To make ALSA debug messages more verbose, enable the "Verbose printk"
22 and "Debug" options. To check for memory leaks, turn on "Debug memory"
23 too. "Debug detection" will add checks for the detection of cards.
25 Please note that all the ALSA ISA drivers support the Linux isapnp API
26 (if the card supports ISA PnP). You don't need to configure the cards
33 This depends on your distribution, but normally you use the /dev/MAKEDEV
34 script to create the necessary device nodes. On some systems you use a
35 script named 'snddevices'.
41 The user can load modules with options. If the module supports more than
42 one card and you have more than one card of the same type then you can
43 specify multiple values for the option separated by commas.
45 Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
50 The core ALSA module. It is used by all ALSA card drivers.
51 It takes the following options which have global effects.
53 major - major number for sound driver
56 - limiting card index for auto-loading (1-8)
58 - For auto-loading more than one card, specify this
59 option together with snd-card-X aliases.
60 slots - Reserve the slot index for the given driver.
61 This option takes multiple strings.
62 See "Module Autoloading Support" section for details.
67 The PCM OSS emulation module.
68 This module takes options which change the mapping of devices.
70 dsp_map - PCM device number maps assigned to the 1st OSS device.
72 adsp_map - PCM device number maps assigned to the 2st OSS device.
75 - Don't block opening busy PCM devices. Default: 1
77 For example, when dsp_map=2, /dev/dsp will be mapped to PCM #2 of
78 the card #0. Similarly, when adsp_map=0, /dev/adsp will be mapped
79 to PCM #0 of the card #0.
80 For changing the second or later card, specify the option with
81 commas, such like "dsp_map=0,1".
83 nonblock_open option is used to change the behavior of the PCM
84 regarding opening the device. When this option is non-zero,
85 opening a busy OSS PCM device won't be blocked but return
86 immediately with EAGAIN (just like O_NONBLOCK flag).
91 This module takes options which change the mapping of devices.
92 similar to those of the snd-pcm-oss module.
94 midi_map - MIDI device number maps assigned to the 1st OSS device.
96 amidi_map - MIDI device number maps assigned to the 2st OSS device.
99 Common parameters for top sound card modules
100 --------------------------------------------
102 Each of top level sound card module takes the following options.
104 index - index (slot #) of sound card
105 - Values: 0 through 31 or negative
106 - If nonnegative, assign that index number
107 - if negative, interpret as a bitmask of permissible
108 indices; the first free permitted index is assigned
110 id - card ID (identifier or name)
111 - Can be up to 15 characters long
112 - Default: the card type
113 - A directory by this name is created under /proc/asound/
114 containing information about the card
115 - This ID can be used instead of the index number in
118 - Default: enabled, for PCI and ISA PnP cards
123 Module for AdLib FM cards.
125 port - port # for OPL chip
127 This module supports multiple cards. It does not support autoprobe, so
128 the port must be specified. For actual AdLib FM cards it will be 0x388.
129 Note that this card does not have PCM support and no mixer; only FM
132 Make sure you have "sbiload" from the alsa-tools package available and,
133 after loading the module, find out the assigned ALSA sequencer port
134 number through "sbiload -l". Example output:
136 Port Client name Port name
137 64:0 OPL2 FM synth OPL2 FM Port
139 Load the std.sb and drums.sb patches also supplied by sbiload:
141 sbiload -p 64:0 std.sb drums.sb
143 If you use this driver to drive an OPL3, you can use std.o3 and drums.o3
144 instead. To have the card produce sound, use aplaymidi from alsa-utils:
146 aplaymidi -p 64:0 foo.mid
151 Module for sound cards based on Analog Devices AD1816A/AD1815 ISA chips.
153 clockfreq - Clock frequency for AD1816A chip (default = 0, 33000Hz)
155 This module supports multiple cards, autoprobe and PnP.
160 Module for sound cards based on AD1848/AD1847/CS4248 ISA chips.
162 port - port # for AD1848 chip
163 irq - IRQ # for AD1848 chip
164 dma1 - DMA # for AD1848 chip (0,1,3)
166 This module supports multiple cards. It does not support autoprobe
167 thus main port must be specified!!! Other ports are optional.
169 The power-management is supported.
174 Module for Analog Devices AD1889 chips.
176 ac97_quirk - AC'97 workaround for strange hardware
177 See the description of intel8x0 module for details.
179 This module supports multiple cards.
184 Module for ALi M5451 PCI chip.
186 pcm_channels - Number of hardware channels assigned for PCM
187 spdif - Support SPDIF I/O
190 This module supports one chip and autoprobe.
192 The power-management is supported.
197 Module for sound cards based on Avance Logic ALS100/ALS120 ISA chips.
199 This module supports multiple cards, autoprobe and PnP.
201 The power-management is supported.
206 Module for Avance Logic ALS300 and ALS300+
208 This module supports multiple cards.
210 The power-management is supported.
215 Module for sound cards based on Avance Logic ALS4000 PCI chip.
217 joystick_port - port # for legacy joystick support.
218 0 = disabled (default), 1 = auto-detect
220 This module supports multiple cards, autoprobe and PnP.
222 The power-management is supported.
227 Module for ATI IXP 150/200/250/400 AC97 controllers.
229 ac97_clock - AC'97 clock (default = 48000)
230 ac97_quirk - AC'97 workaround for strange hardware
231 See "AC97 Quirk Option" section below.
232 ac97_codec - Workaround to specify which AC'97 codec
233 instead of probing. If this works for you
234 file a bug with your `lspci -vn` output.
236 -1 -- Default behavior.
237 0-2 -- Use the specified codec.
238 spdif_aclink - S/PDIF transfer over AC-link (default = 1)
240 This module supports one card and autoprobe.
242 ATI IXP has two different methods to control SPDIF output. One is
243 over AC-link and another is over the "direct" SPDIF output. The
244 implementation depends on the motherboard, and you'll need to
245 choose the correct one via spdif_aclink module option.
247 The power-management is supported.
249 Module snd-atiixp-modem
250 -----------------------
252 Module for ATI IXP 150/200/250 AC97 modem controllers.
254 This module supports one card and autoprobe.
256 Note: The default index value of this module is -2, i.e. the first
259 The power-management is supported.
261 Module snd-au8810, snd-au8820, snd-au8830
262 -----------------------------------------
264 Module for Aureal Vortex, Vortex2 and Advantage device.
266 pcifix - Control PCI workarounds
267 0 = Disable all workarounds
268 1 = Force the PCI latency of the Aureal card to 0xff
269 2 = Force the Extend PCI#2 Internal Master for Efficient
270 Handling of Dummy Requests on the VIA KT133 AGP Bridge
271 3 = Force both settings
272 255 = Autodetect what is required (default)
274 This module supports all ADB PCM channels, ac97 mixer, SPDIF, hardware
275 EQ, mpu401, gameport. A3D and wavetable support are still in development.
276 Development and reverse engineering work is being coordinated at
277 http://savannah.nongnu.org/projects/openvortex/
278 SPDIF output has a copy of the AC97 codec output, unless you use the
279 "spdif" pcm device, which allows raw data passthru.
280 The hardware EQ hardware and SPDIF is only present in the Vortex2 and
283 Note: Some ALSA mixer applications don't handle the SPDIF sample rate
284 control correctly. If you have problems regarding this, try
285 another ALSA compliant mixer (alsamixer works).
290 Module for Audiowerk2 sound card
292 This module supports multiple cards.
297 Module for sound cards based on Aztech System AZT2320 ISA chip (PnP only).
299 This module supports multiple cards, PnP and autoprobe.
301 The power-management is supported.
306 Module for sound cards based on Aztech AZF3328 PCI chip.
308 joystick - Enable joystick (default off)
310 This module supports multiple cards.
315 Module for video cards based on Bt87x chips.
317 digital_rate - Override the default digital rate (Hz)
318 load_all - Load the driver even if the card model isn't known
320 This module supports multiple cards.
322 Note: The default index value of this module is -2, i.e. the first
328 Module for Creative Audigy LS and SB Live 24bit
330 This module supports multiple cards.
336 Module for sound cards based on C-Media CMI8330 ISA chips.
338 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
340 with isapnp=0, the following options are available:
342 wssport - port # for CMI8330 chip (WSS)
343 wssirq - IRQ # for CMI8330 chip (WSS)
344 wssdma - first DMA # for CMI8330 chip (WSS)
345 sbport - port # for CMI8330 chip (SB16)
346 sbirq - IRQ # for CMI8330 chip (SB16)
347 sbdma8 - 8bit DMA # for CMI8330 chip (SB16)
348 sbdma16 - 16bit DMA # for CMI8330 chip (SB16)
350 This module supports multiple cards and autoprobe.
352 The power-management is supported.
357 Module for C-Media CMI8338/8738/8768/8770 PCI sound cards.
359 mpu_port - port address of MIDI interface (8338 only):
360 0x300,0x310,0x320,0x330 = legacy port,
361 0 = disable (default)
362 fm_port - port address of OPL-3 FM synthesizer (8x38 only):
364 1 = integrated PCI port (default on 8738),
366 soft_ac3 - Software-conversion of raw SPDIF packets (model 033 only)
368 joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
370 This module supports autoprobe and multiple cards.
372 The power-management is supported.
377 Module for sound cards based on CS4231 ISA chips.
379 port - port # for CS4231 chip
380 mpu_port - port # for MPU-401 UART (optional), -1 = disable
381 irq - IRQ # for CS4231 chip
382 mpu_irq - IRQ # for MPU-401 UART
383 dma1 - first DMA # for CS4231 chip
384 dma2 - second DMA # for CS4231 chip
386 This module supports multiple cards. This module does not support autoprobe
387 thus main port must be specified!!! Other ports are optional.
389 The power-management is supported.
394 Module for sound cards based on CS4232/CS4232A ISA chips.
396 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
398 with isapnp=0, the following options are available:
400 port - port # for CS4232 chip (PnP setup - 0x534)
401 cport - control port # for CS4232 chip (PnP setup - 0x120,0x210,0xf00)
402 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
403 fm_port - FM port # for CS4232 chip (PnP setup - 0x388), -1 = disable
404 irq - IRQ # for CS4232 chip (5,7,9,11,12,15)
405 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
406 dma1 - first DMA # for CS4232 chip (0,1,3)
407 dma2 - second DMA # for Yamaha CS4232 chip (0,1,3), -1 = disable
409 This module supports multiple cards. This module does not support autoprobe
410 (if ISA PnP is not used) thus main port must be specified!!! Other ports are
413 The power-management is supported.
418 Module for sound cards based on CS4235/CS4236/CS4236B/CS4237B/
419 CS4238B/CS4239 ISA chips.
421 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
423 with isapnp=0, the following options are available:
425 port - port # for CS4236 chip (PnP setup - 0x534)
426 cport - control port # for CS4236 chip (PnP setup - 0x120,0x210,0xf00)
427 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
428 fm_port - FM port # for CS4236 chip (PnP setup - 0x388), -1 = disable
429 irq - IRQ # for CS4236 chip (5,7,9,11,12,15)
430 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
431 dma1 - first DMA # for CS4236 chip (0,1,3)
432 dma2 - second DMA # for CS4236 chip (0,1,3), -1 = disable
434 This module supports multiple cards. This module does not support autoprobe
435 (if ISA PnP is not used) thus main port and control port must be
436 specified!!! Other ports are optional.
438 The power-management is supported.
443 Module for Cirrus Logic CS4281 soundchip.
445 dual_codec - Secondary codec ID (0 = disable, default)
447 This module supports multiple cards.
449 The power-management is supported.
454 Module for PCI sound cards based on CS4610/CS4612/CS4614/CS4615/CS4622/
455 CS4624/CS4630/CS4280 PCI chips.
457 external_amp - Force to enable external amplifier.
458 thinkpad - Force to enable Thinkpad's CLKRUN control.
459 mmap_valid - Support OSS mmap mode (default = 0).
461 This module supports multiple cards and autoprobe.
462 Usually external amp and CLKRUN controls are detected automatically
463 from PCI sub vendor/device ids. If they don't work, give the options
466 The power-management is supported.
471 Module for Cyrix/NatSemi Geode 5530 chip.
473 Module snd-cs5535audio
474 ----------------------
476 Module for multifunction CS5535 companion PCI device
478 The power-management is supported.
483 Module for Echoaudio Darla20
485 This module supports multiple cards.
486 The driver requires the firmware loader support on kernel.
491 Module for Echoaudio Darla24
493 This module supports multiple cards.
494 The driver requires the firmware loader support on kernel.
499 Module for Diamond Technologies DT-019X / Avance Logic ALS-007 (PnP
502 This module supports multiple cards. This module is enabled only with
505 The power-management is supported.
510 Module for the dummy sound card. This "card" doesn't do any output
511 or input, but you may use this module for any application which
512 requires a sound card (like RealPlayer).
514 The power-management is supported.
519 Module for Echoaudio 3G cards (Gina3G/Layla3G)
521 This module supports multiple cards.
522 The driver requires the firmware loader support on kernel.
527 Module for EMU10K1/EMU10k2 based PCI sound cards.
528 * Sound Blaster Live!
529 * Sound Blaster PCI 512
530 * Emu APS (partially supported)
531 * Sound Blaster Audigy
533 extin - bitmap of available external inputs for FX8010 (see bellow)
534 extout - bitmap of available external outputs for FX8010 (see bellow)
535 seq_ports - allocated sequencer ports (4 by default)
536 max_synth_voices - limit of voices used for wavetable (64 by default)
537 max_buffer_size - specifies the maximum size of wavetable/pcm buffers
538 given in MB unit. Default value is 128.
539 enable_ir - enable IR
541 This module supports multiple cards and autoprobe.
543 Input & Output configurations [extin/extout]
544 * Creative Card wo/Digital out [0x0003/0x1f03]
545 * Creative Card w/Digital out [0x0003/0x1f0f]
546 * Creative Card w/Digital CD in [0x000f/0x1f0f]
547 * Creative Card wo/Digital out + LiveDrive [0x3fc3/0x1fc3]
548 * Creative Card w/Digital out + LiveDrive [0x3fc3/0x1fcf]
549 * Creative Card w/Digital CD in + LiveDrive [0x3fcf/0x1fcf]
550 * Creative Card wo/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
551 * Creative Card w/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
552 * Creative Card w/Digital CD in + Digital I/O 2 [0x0fcf/0x1f0f]
553 * Creative Card 5.1/w Digital out + LiveDrive [0x3fc3/0x1fff]
554 * Creative Card 5.1 (c) 2003 [0x3fc3/0x7cff]
555 * Creative Card all ins and outs [0x3fff/0x7fff]
557 The power-management is supported.
562 Module for Creative Emu10k1X (SB Live Dell OEM version)
564 This module supports multiple cards.
569 Module for Ensoniq AudioPCI ES1370 PCI sound cards.
570 * SoundBlaster PCI 64
571 * SoundBlaster PCI 128
573 joystick - Enable joystick (default off)
575 This module supports multiple cards and autoprobe.
577 The power-management is supported.
582 Module for Ensoniq AudioPCI ES1371 PCI sound cards.
583 * SoundBlaster PCI 64
584 * SoundBlaster PCI 128
585 * SoundBlaster Vibra PCI
587 joystick_port - port # for joystick (0x200,0x208,0x210,0x218),
588 0 = disable (default), 1 = auto-detect
590 This module supports multiple cards and autoprobe.
592 The power-management is supported.
597 Module for sound cards based on ESS ES968 chip (PnP only).
599 This module supports multiple cards, PnP and autoprobe.
601 The power-management is supported.
606 Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
608 port - port # for ES-1688 chip (0x220,0x240,0x260)
609 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
610 irq - IRQ # for ES-1688 chip (5,7,9,10)
611 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
612 dma8 - DMA # for ES-1688 chip (0,1,3)
614 This module supports multiple cards and autoprobe (without MPU-401 port).
619 Module for ESS AudioDrive ES-18xx sound cards.
621 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
623 with isapnp=0, the following options are available:
625 port - port # for ES-18xx chip (0x220,0x240,0x260)
626 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
627 fm_port - port # for FM (optional, not used)
628 irq - IRQ # for ES-18xx chip (5,7,9,10)
629 dma1 - first DMA # for ES-18xx chip (0,1,3)
630 dma2 - first DMA # for ES-18xx chip (0,1,3)
632 This module supports multiple cards, ISA PnP and autoprobe (without MPU-401
633 port if native ISA PnP routines are not used).
634 When dma2 is equal with dma1, the driver works as half-duplex.
636 The power-management is supported.
641 Module for sound cards based on ESS Solo-1 (ES1938,ES1946) chips.
643 This module supports multiple cards and autoprobe.
645 The power-management is supported.
650 Module for sound cards based on ESS Maestro-1/2/2E (ES1968/ES1978) chips.
652 total_bufsize - total buffer size in kB (1-4096kB)
653 pcm_substreams_p - playback channels (1-8, default=2)
654 pcm_substreams_c - capture channels (1-8, default=0)
655 clock - clock (0 = auto-detection)
656 use_pm - support the power-management (0 = off, 1 = on,
658 enable_mpu - enable MPU401 (0 = off, 1 = on, 2 = auto (default))
659 joystick - enable joystick (default off)
661 This module supports multiple cards and autoprobe.
663 The power-management is supported.
668 Module for ForteMedia FM801 based PCI sound cards.
670 tea575x_tuner - Enable TEA575x tuner
671 - 1 = MediaForte 256-PCS
672 - 2 = MediaForte 256-PCPR
673 - 3 = MediaForte 64-PCR
674 - High 16-bits are video (radio) device number + 1
675 - example: 0x10002 (MediaForte 256-PCPR, device 1)
677 This module supports multiple cards and autoprobe.
679 The power-management is supported.
684 Module for Echoaudio Gina20
686 This module supports multiple cards.
687 The driver requires the firmware loader support on kernel.
692 Module for Echoaudio Gina24
694 This module supports multiple cards.
695 The driver requires the firmware loader support on kernel.
697 Module snd-gusclassic
698 ---------------------
700 Module for Gravis UltraSound Classic sound card.
702 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
703 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
704 dma1 - DMA # for GF1 chip (1,3,5,6,7)
705 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
706 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
707 voices - GF1 voices limit (14-32)
708 pcm_voices - reserved PCM voices
710 This module supports multiple cards and autoprobe.
712 Module snd-gusextreme
713 ---------------------
715 Module for Gravis UltraSound Extreme (Synergy ViperMax) sound card.
717 port - port # for ES-1688 chip (0x220,0x230,0x240,0x250,0x260)
718 gf1_port - port # for GF1 chip (0x210,0x220,0x230,0x240,0x250,0x260,0x270)
719 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable
720 irq - IRQ # for ES-1688 chip (5,7,9,10)
721 gf1_irq - IRQ # for GF1 chip (3,5,9,11,12,15)
722 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
723 dma8 - DMA # for ES-1688 chip (0,1,3)
724 dma1 - DMA # for GF1 chip (1,3,5,6,7)
725 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
726 voices - GF1 voices limit (14-32)
727 pcm_voices - reserved PCM voices
729 This module supports multiple cards and autoprobe (without MPU-401 port).
734 Module for Gravis UltraSound MAX sound card.
736 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
737 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
738 dma1 - DMA # for GF1 chip (1,3,5,6,7)
739 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
740 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
741 voices - GF1 voices limit (14-32)
742 pcm_voices - reserved PCM voices
744 This module supports multiple cards and autoprobe.
749 Module for Intel HD Audio (ICH6, ICH6M, ESB2, ICH7, ICH8),
750 ATI SB450, SB600, RS600,
754 [Multiple options for each card instance]
755 model - force the model name
756 position_fix - Fix DMA pointer (0 = auto, 1 = use LPIB, 2 = POSBUF)
757 probe_mask - Bitmask to probe codecs (default = -1, meaning all slots)
758 bdl_pos_adj - Specifies the DMA IRQ timing delay in samples.
759 Passing -1 will make the driver to choose the appropriate
760 value based on the controller chip.
762 [Single (global) options]
763 single_cmd - Use single immediate commands to communicate with
764 codecs (for debugging only)
765 enable_msi - Enable Message Signaled Interrupt (MSI) (default = off)
766 power_save - Automatic power-saving timtout (in second, 0 =
768 power_save_controller - Reset HD-audio controller in power-saving mode
771 This module supports multiple cards and autoprobe.
773 Each codec may have a model table for different configurations.
774 If your machine isn't listed there, the default (usually minimal)
775 configuration is set up. You can pass "model=<name>" option to
776 specify a certain model in such a case. There are different
777 models depending on the codec chip.
779 Model name Description
780 ---------- -----------
782 3stack 3-jack in back and a headphone out
783 3stack-digout 3-jack in back, a HP out and a SPDIF out
784 5stack 5-jack in back, 2-jack in front
785 5stack-digout 5-jack in back, 2-jack in front, a SPDIF out
786 6stack 6-jack in back, 2-jack in front
787 6stack-digout 6-jack with a SPDIF out
789 z71v 3-jack (HP shared SPDIF)
790 asus 3-jack (ASUS Mobo)
792 asus-dig ASUS with SPDIF out
793 asus-dig2 ASUS with SPDIF out (using GPIO2)
795 fujitsu Fujitsu Laptops (Pi1536)
797 lg LG laptop (m1 express dual)
798 lg-lw LG LW20/LW25 laptop
800 clevo Clevo laptops (m520G, m665n)
801 medion Medion Rim 2150
802 test for testing/debugging purpose, almost all controls can be
803 adjusted. Appearing only when compiled with
805 auto auto-config reading BIOS (default)
809 hp-3013 HP machines (3013-variant)
810 fujitsu Fujitsu S7020
812 will Will laptops (PB V7900)
813 replacer Replacer 672V
814 basic fixed pin assignment (old default model)
815 test for testing/debugging purpose, almost all controls can
816 adjusted. Appearing only when compiled with
818 auto auto-config reading BIOS (default)
821 fujitsu Fujitsu Laptop
822 hp-bpc HP xw4400/6400/8400/9400 laptops
823 hp-bpc-d7000 HP BPC D7000
824 hp-tc-t5735 HP Thin Client T5735
828 hippo Hippo (ATI) with jack detection, Sony UX-90s
829 hippo_1 Hippo (Benq) with jack detection
830 sony-assamd Sony ASSAMD
831 ultra Samsung Q1 Ultra Vista model
832 lenovo-3000 Lenovo 3000 y410
833 basic fixed pin assignment w/o SPDIF
834 auto auto-config reading BIOS (default)
837 quanta-il1 Quanta IL1 mini-notebook
841 dell Dell OEM laptops (Vostro 1200)
843 test for testing/debugging purpose, almost all controls can
844 adjusted. Appearing only when compiled with
846 auto auto-config reading BIOS (default)
852 3stack-dig 3-stack (2-channel) with SPDIF
853 3stack-6ch 3-stack (6-channel)
854 3stack-6ch-dig 3-stack (6-channel) with SPDIF
855 6stack-dig 6-stack with SPDIF
856 lenovo-101e Lenovo laptop
857 eeepc-p701 ASUS Eeepc P701
858 eeepc-ep20 ASUS Eeepc EP20
863 auto auto-config reading BIOS (default)
866 3stack-dig 3-jack with SPDIF I/O
867 6stack-dig 6-jack digital with SPDIF I/O
869 targa Targa T8, MSI-1049 T8
872 macpro MacPro support
873 mbp3 Macbook Pro rev3
874 imac24 iMac 24'' with jack detection
876 auto auto-config reading BIOS (default)
879 3stack-dig 3-jack with SPDIF I/O
880 6stack-dig 6-jack digital with SPDIF I/O
881 3stack-6ch 3-jack 6-channel
882 3stack-6ch-dig 3-jack 6-channel with SPDIF I/O
883 6stack-dig-demo 6-jack digital for Intel demo board
884 acer Acer laptops (Travelmate 3012WTMi, Aspire 5600, etc)
885 acer-aspire Acer Aspire 9810
886 medion Medion Laptops
887 medion-md2 Medion MD2
889 targa-2ch-dig Targs/MSI with 2-channel
890 laptop-eapd 3-jack with SPDIF I/O and EAPD (Clevo M540JE, M550JE)
891 lenovo-101e Lenovo 101E
892 lenovo-nb0763 Lenovo NB0763
893 lenovo-ms7195-dig Lenovo MS7195
895 3stack-hp HP machines with 3stack (Lucknow, Samba boards)
896 6stack-dell Dell machines with 6stack (Inspiron 530)
898 clevo-m720 Clevo M720 laptop series
899 fujitsu-pi2515 Fujitsu AMILO Pi2515
900 auto auto-config reading BIOS (default)
904 3stack-dig 3-jack with SPDIF I/O
905 6stack-dig 6-jack with SPDIF I/O
906 3stack-660 3-jack (for ALC660)
907 uniwill-m31 Uniwill M31 laptop
908 toshiba Toshiba laptop support
909 asus Asus laptop support
910 asus-laptop ASUS F2/F3 laptops
911 auto auto-config reading BIOS (default)
915 3stack-dig 3-jack with SPDIF OUT
916 6stack-dig 6-jack with SPDIF OUT
917 3stack-660 3-jack (for ALC660VD)
918 3stack-660-digout 3-jack with SPDIF OUT (for ALC660VD)
919 lenovo Lenovo 3000 C200
920 dallas Dallas laptops
922 auto auto-config reading BIOS (default)
925 minimal 3-jack in back
926 min_fp 3-jack in back, 2-jack in front
927 full 6-jack in back, 2-jack in front
928 full_dig 6-jack in back, 2-jack in front, SPDIF I/O
929 allout 5-jack in back, 2-jack in front, SPDIF out
930 auto auto-config reading BIOS (default)
933 3stack 3-stack mode (default)
936 AD1884A / AD1883 / AD1984A / AD1984B
937 desktop 3-stack desktop (default)
938 laptop laptop with HP jack sensing
939 mobile mobile devices with HP jack sensing
940 thinkpad Lenovo Thinkpad X300
946 basic 3-jack (default)
948 thinkpad Lenovo Thinkpad T60/X60/Z60
955 basic default configuration
956 thinkpad Lenovo Thinkpad T61/X61
960 6stack 6-jack, separate surrounds (default)
961 3stack 3-stack, shared surrounds
962 laptop 2-channel only (FSC V2060, Samsung M50)
963 laptop-eapd 2-channel with EAPD (Samsung R65, ASUS A6J)
964 laptop-automute 2-channel with EAPD and HP-automute (Lenovo N100)
965 ultra 2-channel with EAPD (Samsung Ultra tablet PC)
967 AD1988/AD1988B/AD1989A/AD1989B
969 6stack-dig ditto with SPDIF
971 3stack-dig ditto with SPDIF
972 laptop 3-jack with hp-jack automute
973 laptop-dig ditto with SPDIF
974 auto auto-config reading BIOS (default)
977 laptop-hpsense Laptop with HP sense (old model laptop)
978 laptop-micsense Laptop with Mic sense (old model fujitsu)
979 laptop-hpmicsense Laptop with HP and Mic senses
981 test for testing/debugging purpose, almost all controls
982 can be adjusted. Appearing only when compiled with
986 laptop Basic Laptop config
987 laptop-hp Laptop config for some HP models (subdevice 30A5)
988 laptop-eapd Laptop config with EAPD support
989 test for testing/debugging purpose, almost all controls
990 can be adjusted. Appearing only when compiled with
994 laptop Basic Laptop config (default)
999 dell-d21 Dell (unknown)
1000 dell-d22 Dell (unknown)
1001 dell-d23 Dell (unknown)
1002 dell-m21 Dell Inspiron 630m, Dell Inspiron 640m
1003 dell-m22 Dell Latitude D620, Dell Latitude D820
1004 dell-m23 Dell XPS M1710, Dell Precision M90
1005 dell-m24 Dell Latitude 120L
1006 dell-m25 Dell Inspiron E1505n
1007 dell-m26 Dell Inspiron 1501
1008 dell-m27 Dell Inspiron E1705/9400
1009 gateway Gateway laptops with EAPD control
1010 panasonic Panasonic CF-74
1014 dell-m42 Dell (unknown)
1015 dell-m43 Dell Precision
1016 dell-m44 Dell Inspiron
1021 5stack D945 5stack + SPDIF
1022 intel-mac-v1 Intel Mac Type 1
1023 intel-mac-v2 Intel Mac Type 2
1024 intel-mac-v3 Intel Mac Type 3
1025 intel-mac-v4 Intel Mac Type 4
1026 intel-mac-v5 Intel Mac Type 5
1027 macmini Intel Mac Mini (equivalent with type 3)
1028 macbook Intel Mac Book (eq. type 5)
1029 macbook-pro-v1 Intel Mac Book Pro 1st generation (eq. type 3)
1030 macbook-pro Intel Mac Book Pro 2nd generation (eq. type 3)
1031 imac-intel Intel iMac (eq. type 2)
1032 imac-intel-20 Intel iMac (newer version) (eq. type 3)
1033 dell-d81 Dell (unknown)
1034 dell-d82 Dell (unknown)
1035 dell-m81 Dell (unknown)
1036 dell-m82 Dell XPS M1210
1039 ref Reference board, base config
1040 m2-2 Some Gateway MX series laptops
1041 m6 Some Gateway NX series laptops
1042 pa6 Gateway NX860 series
1044 STAC9227/9228/9229/927x
1047 5stack D965 5stack + SPDIF
1048 dell-3stack Dell Dimension E520
1049 dell-bios Fixes with Dell BIOS setup
1053 dell-m4-1 Dell desktops
1054 dell-m4-2 Dell desktops
1058 dell-m6 Dell desktops
1061 vaio Setup for VAIO FE550G/SZ110
1062 vaio-ar Setup for VAIO AR
1064 The model name "genric" is treated as a special case. When this
1065 model is given, the driver uses the generic codec parser without
1066 "codec-patch". It's sometimes good for testing and debugging.
1068 If the default configuration doesn't work and one of the above
1069 matches with your device, report it together with the PCI
1070 subsystem ID (output of "lspci -nv") to ALSA BTS or alsa-devel
1071 ML (see the section "Links and Addresses").
1073 power_save and power_save_controller options are for power-saving
1074 mode. See powersave.txt for details.
1076 Note 2: If you get click noises on output, try the module option
1077 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
1078 register value without FIFO size correction as the current
1079 DMA pointer. position_fix=2 will make the driver to use
1080 the position buffer instead of reading SD_LPIB register.
1081 (Usually SD_LPLIB register is more accurate than the
1084 NB: If you get many "azx_get_response timeout" messages at
1085 loading, it's likely a problem of interrupts (e.g. ACPI irq
1086 routing). Try to boot with options like "pci=noacpi". Also, you
1087 can try "single_cmd=1" module option. This will switch the
1088 communication method between HDA controller and codecs to the
1089 single immediate commands instead of CORB/RIRB. Basically, the
1090 single command mode is provided only for BIOS, and you won't get
1091 unsolicited events, too. But, at least, this works independently
1092 from the irq. Remember this is a last resort, and should be
1093 avoided as much as possible...
1095 MORE NOTES ON "azx_get_response timeout" PROBLEMS:
1096 On some hardwares, you may need to add a proper probe_mask option
1097 to avoid the "azx_get_response timeout" problem above, instead.
1098 This occurs when the access to non-existing or non-working codec slot
1099 (likely a modem one) causes a stall of the communication via HD-audio
1100 bus. You can see which codec slots are probed by enabling
1101 CONFIG_SND_DEBUG_VERBOSE, or simply from the file name of the codec
1102 proc files. Then limit the slots to probe by probe_mask option.
1103 For example, probe_mask=1 means to probe only the first slot, and
1104 probe_mask=4 means only the third slot.
1106 The power-management is supported.
1111 Module for RME Hammerfall DSP audio interface(s)
1113 This module supports multiple cards.
1115 Note: The firmware data can be automatically loaded via hotplug
1116 when CONFIG_FW_LOADER is set. Otherwise, you need to load
1117 the firmware via hdsploader utility included in alsa-tools
1119 The firmware data is found in alsa-firmware package.
1121 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1122 module did formerly. It will allocate the buffers in advance
1123 when any HDSP cards are found. To make the buffer
1124 allocation sure, load snd-page-alloc module in the early
1125 stage of boot sequence. See "Early Buffer Allocation"
1131 Module for RME HDSP MADI board.
1133 precise_ptr - Enable precise pointer, or disable.
1134 line_outs_monitor - Send playback streams to analog outs by default.
1135 enable_monitor - Enable Analog Out on Channel 63/64 by default.
1137 See hdspm.txt for details.
1142 Module for the MediaTek/TempoTec HiFier Fantasia sound card.
1144 This module supports autoprobe and multiple cards.
1146 Power management is _not_ supported.
1151 Module for Envy24 (ICE1712) based PCI sound cards.
1152 * MidiMan M Audio Delta 1010
1153 * MidiMan M Audio Delta 1010LT
1154 * MidiMan M Audio Delta DiO 2496
1155 * MidiMan M Audio Delta 66
1156 * MidiMan M Audio Delta 44
1157 * MidiMan M Audio Delta 410
1158 * MidiMan M Audio Audiophile 2496
1161 * TerraTec EWX 24/96
1162 * TerraTec DMX 6Fire
1164 * Hoontech SoundTrack DSP 24
1165 * Hoontech SoundTrack DSP 24 Value
1166 * Hoontech SoundTrack DSP 24 Media 7.1
1167 * Event Electronics, EZ8
1169 * Lionstracs, Mediastaton
1171 model - Use the given board model, one of the following:
1172 delta1010, dio2496, delta66, delta44, audiophile, delta410,
1173 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
1174 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
1175 phase88, mediastation
1176 omni - Omni I/O support for MidiMan M-Audio Delta44/66
1177 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transceiver)
1178 in msec resolution, default value is 500 (0.5 sec)
1180 This module supports multiple cards and autoprobe. Note: The consumer part
1181 is not used with all Envy24 based cards (for example in the MidiMan Delta
1184 Note: The supported board is detected by reading EEPROM or PCI
1185 SSID (if EEPROM isn't available). You can override the
1186 model by passing "model" module option in case that the
1187 driver isn't configured properly or you want to try another
1193 Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
1194 * MidiMan M Audio Revolution 5.1
1195 * MidiMan M Audio Revolution 7.1
1196 * MidiMan M Audio Audiophile 192
1198 * TerraTec Aureon 5.1 Sky
1199 * TerraTec Aureon 7.1 Space
1200 * TerraTec Aureon 7.1 Universe
1203 * AudioTrak Prodigy 7.1
1204 * AudioTrak Prodigy 7.1LT
1205 * AudioTrak Prodigy 192
1207 * Albatron K8X800 Pro II
1208 * Chaintech ZNF3-150
1209 * Chaintech ZNF3-250
1216 model - Use the given board model, one of the following:
1217 revo51, revo71, amp2000, prodigy71, prodigy71lt,
1218 prodigy192, aureon51, aureon71, universe, ap192,
1219 k8x800, phase22, phase28, ms300, av710, se200pci,
1222 This module supports multiple cards and autoprobe.
1224 Note: The supported board is detected by reading EEPROM or PCI
1225 SSID (if EEPROM isn't available). You can override the
1226 model by passing "model" module option in case that the
1227 driver isn't configured properly or you want to try another
1233 Module for Echoaudio Indigo
1235 This module supports multiple cards.
1236 The driver requires the firmware loader support on kernel.
1241 Module for Echoaudio Indigo DJ
1243 This module supports multiple cards.
1244 The driver requires the firmware loader support on kernel.
1249 Module for Echoaudio Indigo IO
1251 This module supports multiple cards.
1252 The driver requires the firmware loader support on kernel.
1257 Module for AC'97 motherboards from Intel and compatibles.
1258 * Intel i810/810E, i815, i820, i830, i84x, MX440
1259 ICH5, ICH6, ICH7, ESB2
1260 * SiS 7012 (SiS 735)
1261 * NVidia NForce, NForce2, NForce3, MCP04, CK804
1263 * AMD AMD768, AMD8111
1266 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1267 ac97_quirk - AC'97 workaround for strange hardware
1268 See "AC97 Quirk Option" section below.
1269 buggy_irq - Enable workaround for buggy interrupts on some
1270 motherboards (default yes on nForce chips,
1272 buggy_semaphore - Enable workaround for hardwares with buggy
1273 semaphores (e.g. on some ASUS laptops)
1275 spdif_aclink - Use S/PDIF over AC-link instead of direct connection
1276 from the controller chip
1277 (0 = off, 1 = on, -1 = default)
1279 This module supports one chip and autoprobe.
1281 Note: the latest driver supports auto-detection of chip clock.
1282 if you still encounter too fast playback, specify the clock
1283 explicitly via the module option "ac97_clock=41194".
1285 Joystick/MIDI ports are not supported by this driver. If your
1286 motherboard has these devices, use the ns558 or snd-mpu401
1287 modules, respectively.
1289 The power-management is supported.
1291 Module snd-intel8x0m
1292 --------------------
1294 Module for Intel ICH (i8x0) chipset MC97 modems.
1295 * Intel i810/810E, i815, i820, i830, i84x, MX440
1297 * SiS 7013 (SiS 735)
1298 * NVidia NForce, NForce2, NForce2s, NForce3
1302 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1304 This module supports one card and autoprobe.
1306 Note: The default index value of this module is -2, i.e. the first
1309 The power-management is supported.
1311 Module snd-interwave
1312 --------------------
1314 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
1315 and other sound cards based on AMD InterWave (tm) chip.
1317 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1318 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1319 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1320 effect - 1 = InterWave effects enable (default 0);
1322 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1324 with isapnp=0, the following options are available:
1326 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1327 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1328 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1329 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1331 This module supports multiple cards, autoprobe and ISA PnP.
1333 Module snd-interwave-stb
1334 ------------------------
1336 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
1337 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
1338 circuit for extended control of bass, treble and master volume.
1340 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1341 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1342 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1343 effect - 1 = InterWave effects enable (default 0);
1345 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1347 with isapnp=0, the following options are available:
1349 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1350 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
1351 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1352 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1353 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1355 This module supports multiple cards, autoprobe and ISA PnP.
1360 Module for Korg 1212 IO PCI card
1362 This module supports multiple cards.
1367 Module for Echoaudio Layla20
1369 This module supports multiple cards.
1370 The driver requires the firmware loader support on kernel.
1375 Module for Echoaudio Layla24
1377 This module supports multiple cards.
1378 The driver requires the firmware loader support on kernel.
1383 Module for Allegro/Maestro3 chips
1385 external_amp - enable external amp (enabled by default)
1386 amp_gpio - GPIO pin number for external amp (0-15) or
1387 -1 for default pin (8 for allegro, 1 for
1390 This module supports autoprobe and multiple chips.
1392 Note: the binding of amplifier is dependent on hardware.
1393 If there is no sound even though all channels are unmuted, try to
1394 specify other gpio connection via amp_gpio option.
1395 For example, a Panasonic notebook might need "amp_gpio=0x0d"
1398 The power-management is supported.
1403 Module for Echoaudio Mia
1405 This module supports multiple cards.
1406 The driver requires the firmware loader support on kernel.
1411 Module for Miro soundcards: miroSOUND PCM 1 pro,
1413 miroSOUND PCM 20 Radio.
1415 port - Port # (0x530,0x604,0xe80,0xf40)
1416 irq - IRQ # (5,7,9,10,11)
1417 dma1 - 1st dma # (0,1,3)
1418 dma2 - 2nd dma # (0,1)
1419 mpu_port - MPU-401 port # (0x300,0x310,0x320,0x330)
1420 mpu_irq - MPU-401 irq # (5,7,9,10)
1421 fm_port - FM Port # (0x388)
1422 wss - enable WSS mode
1423 ide - enable onboard ide support
1428 Module for Digigram miXart8 sound cards.
1430 This module supports multiple cards.
1431 Note: One miXart8 board will be represented as 4 alsa cards.
1432 See MIXART.txt for details.
1434 When the driver is compiled as a module and the hotplug firmware
1435 is supported, the firmware data is loaded via hotplug automatically.
1436 Install the necessary firmware files in alsa-firmware package.
1437 When no hotplug fw loader is available, you need to load the
1438 firmware via mixartloader utility in alsa-tools package.
1443 Module for Echoaudio Mona
1445 This module supports multiple cards.
1446 The driver requires the firmware loader support on kernel.
1451 Module for MPU-401 UART devices.
1453 port - port number or -1 (disable)
1454 irq - IRQ number or -1 (disable)
1455 pnp - PnP detection - 0 = disable, 1 = enable (default)
1457 This module supports multiple devices and PnP.
1462 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
1465 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
1466 irq - IRQ # for MTPAV (7,5, default=7)
1467 hwports - number of supported hardware ports, default=8.
1469 Module supports only 1 card. This module has no enable option.
1474 Module for Ego Systems (ESI) Miditerminal 4140
1476 This module supports multiple devices.
1477 Requires parport (CONFIG_PARPORT).
1482 Module for NeoMagic NM256AV/ZX chips
1484 playback_bufsize - max playback frame size in kB (4-128kB)
1485 capture_bufsize - max capture frame size in kB (4-128kB)
1486 force_ac97 - 0 or 1 (disabled by default)
1487 buffer_top - specify buffer top address
1488 use_cache - 0 or 1 (disabled by default)
1489 vaio_hack - alias buffer_top=0x25a800
1490 reset_workaround - enable AC97 RESET workaround for some laptops
1491 reset_workaround2 - enable extended AC97 RESET workaround for some
1494 This module supports one chip and autoprobe.
1496 The power-management is supported.
1498 Note: on some notebooks the buffer address cannot be detected
1499 automatically, or causes hang-up during initialization.
1500 In such a case, specify the buffer top address explicitly via
1501 the buffer_top option.
1503 Sony F250: buffer_top=0x25a800
1504 Sony F270: buffer_top=0x272800
1505 The driver supports only ac97 codec. It's possible to force
1506 to initialize/use ac97 although it's not detected. In such a
1507 case, use force_ac97=1 option - but *NO* guarantee whether it
1510 Note: The NM256 chip can be linked internally with non-AC97
1511 codecs. This driver supports only the AC97 codec, and won't work
1512 with machines with other (most likely CS423x or OPL3SAx) chips,
1513 even though the device is detected in lspci. In such a case, try
1514 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
1515 but some doesn't have ISA PnP. You'll need to specify isapnp=0
1516 and proper hardware parameters in the case without ISA PnP.
1518 Note: some laptops need a workaround for AC97 RESET. For the
1519 known hardware like Dell Latitude LS and Sony PCG-F305, this
1520 workaround is enabled automatically. For other laptops with a
1521 hard freeze, you can try reset_workaround=1 option.
1523 Note: Dell Latitude CSx laptops have another problem regarding
1524 AC97 RESET. On these laptops, reset_workaround2 option is
1525 turned on as default. This option is worth to try if the
1526 previous reset_workaround option doesn't help.
1528 Note: This driver is really crappy. It's a porting from the
1529 OSS driver, which is a result of black-magic reverse engineering.
1530 The detection of codec will fail if the driver is loaded *after*
1531 X-server as described above. You might be able to force to load
1532 the module, but it may result in hang-up. Hence, make sure that
1533 you load this module *before* X if you encounter this kind of
1539 Module for Yamaha OPL3-SA2/SA3 sound cards.
1541 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1543 with isapnp=0, the following options are available:
1545 port - control port # for OPL3-SA chip (0x370)
1546 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
1547 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
1548 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1549 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
1550 irq - IRQ # for OPL3-SA chip (5,7,9,10)
1551 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
1552 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
1554 This module supports multiple cards and ISA PnP. It does not support
1555 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
1557 The power-management is supported.
1559 Module snd-opti92x-ad1848
1560 -------------------------
1562 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
1563 Module works with OAK Mozart cards as well.
1565 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1567 with isapnp=0, the following options are available:
1569 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1570 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1571 fm_port - port # for OPL3 device (0x388)
1572 irq - IRQ # for WSS chip (5,7,9,10,11)
1573 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1574 dma1 - first DMA # for WSS chip (0,1,3)
1576 This module supports only one card, autoprobe and PnP.
1578 Module snd-opti92x-cs4231
1579 -------------------------
1581 Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
1583 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1585 with isapnp=0, the following options are available:
1587 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1588 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1589 fm_port - port # for OPL3 device (0x388)
1590 irq - IRQ # for WSS chip (5,7,9,10,11)
1591 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1592 dma1 - first DMA # for WSS chip (0,1,3)
1593 dma2 - second DMA # for WSS chip (0,1,3)
1595 This module supports only one card, autoprobe and PnP.
1600 Module for sound cards based on OPTi 82c93x chips.
1602 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1604 with isapnp=0, the following options are available:
1606 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1607 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1608 fm_port - port # for OPL3 device (0x388)
1609 irq - IRQ # for WSS chip (5,7,9,10,11)
1610 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1611 dma1 - first DMA # for WSS chip (0,1,3)
1612 dma2 - second DMA # for WSS chip (0,1,3)
1614 This module supports only one card, autoprobe and PnP.
1619 Module for sound cards based on the C-Media CMI8788 chip:
1621 * AuzenTech X-Meridian
1623 * Club3D Theatron DTS
1625 * Razer Barracuda AC-1
1628 This module supports autoprobe and multiple cards.
1630 Power management is _not_ supported.
1635 Module for internal PC-Speaker.
1637 nforce_wa - enable NForce chipset workaround. Expect bad sound.
1639 This module supports system beeps, some kind of PCM playback and
1640 even a few mixer controls.
1645 Module for Digigram PCXHR boards
1647 This module supports multiple cards.
1649 Module snd-portman2x4
1650 ---------------------
1652 Module for Midiman Portman 2x4 parallel port MIDI interface
1654 This module supports multiple cards.
1656 Module snd-powermac (on ppc only)
1657 ---------------------------------
1659 Module for PowerMac, iMac and iBook on-board soundchips
1661 enable_beep - enable beep using PCM (enabled as default)
1663 Module supports autoprobe a chip.
1665 Note: the driver may have problems regarding endianess.
1667 The power-management is supported.
1669 Module snd-pxa2xx-ac97 (on arm only)
1670 ------------------------------------
1672 Module for AC97 driver for the Intel PXA2xx chip
1674 For ARM architecture only.
1676 The power-management is supported.
1681 Module for Conexant Riptide chip
1683 joystick_port - Joystick port # (default: 0x200)
1684 mpu_port - MPU401 port # (default: 0x330)
1685 opl3_port - OPL3 port # (default: 0x388)
1687 This module supports multiple cards.
1688 The driver requires the firmware loader support on kernel.
1689 You need to install the firmware file "riptide.hex" to the standard
1690 firmware path (e.g. /lib/firmware).
1695 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1696 Prodif96 and Prodif Gold) sound cards.
1698 This module supports multiple cards.
1703 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1705 This module supports multiple cards.
1710 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1712 precise_ptr - Enable precise pointer (doesn't work reliably).
1715 This module supports multiple cards.
1717 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1718 module did formerly. It will allocate the buffers in advance
1719 when any RME9652 cards are found. To make the buffer
1720 allocation sure, load snd-page-alloc module in the early
1721 stage of boot sequence. See "Early Buffer Allocation"
1724 Module snd-sa11xx-uda1341 (on arm only)
1725 ---------------------------------------
1727 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1729 Module supports only one card.
1730 Module has no enable and index options.
1732 The power-management is supported.
1737 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1741 port - port # for SB DSP chip (0x220,0x240,0x260)
1742 irq - IRQ # for SB DSP chip (5,7,9,10)
1743 dma8 - DMA # for SB DSP chip (1,3)
1745 This module supports multiple cards and autoprobe.
1747 The power-management is supported.
1749 Module snd-sb16 and snd-sbawe
1750 -----------------------------
1752 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1753 SoundBlaster AWE 32 (PnP),
1754 SoundBlaster AWE 64 PnP
1756 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1757 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1758 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1760 with isapnp=0, the following options are available:
1762 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1763 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1764 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1765 (snd-sbawe module only)
1766 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1767 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1768 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1770 This module supports multiple cards, autoprobe and ISA PnP.
1772 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1773 disable 16bit DMA with dma16 = -1 module parameter.
1774 Also, all Sound Blaster 16 type cards can operate in 16-bit
1775 half duplex mode through 8-bit DMA channel by disabling their
1778 The power-management is supported.
1783 Module for Gallant SC-6000 soundcard.
1785 port - Port # (0x220 or 0x240)
1786 mss_port - MSS Port # (0x530 or 0xe80)
1787 irq - IRQ # (5,7,9,10,11)
1788 mpu_irq - MPU-401 IRQ # (5,7,9,10) ,0 - no MPU-401 irq
1791 This module supports multiple cards.
1793 This card is also known as Audio Excel DSP 16 or Zoltrix AV302.
1798 Module for Aztech Sound Galaxy sound card.
1800 sbport - Port # for SB16 interface (0x220,0x240)
1801 wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
1802 irq - IRQ # (7,9,10,11)
1805 This module supports multiple cards.
1807 The power-management is supported.
1812 Module for ENSONIQ SoundScape PnP cards.
1814 port - Port # (PnP setup)
1815 wss_port - WSS Port # (PnP setup)
1816 irq - IRQ # (PnP setup)
1817 mpu_irq - MPU-401 IRQ # (PnP setup)
1818 dma - DMA # (PnP setup)
1819 dma2 - 2nd DMA # (PnP setup, -1 to disable)
1821 This module supports multiple cards. ISA PnP must be enabled.
1822 You need sscape_ctl tool in alsa-tools package for loading
1825 Module snd-sun-amd7930 (on sparc only)
1826 --------------------------------------
1828 Module for AMD7930 sound chips found on Sparcs.
1830 This module supports multiple cards.
1832 Module snd-sun-cs4231 (on sparc only)
1833 -------------------------------------
1835 Module for CS4231 sound chips found on Sparcs.
1837 This module supports multiple cards.
1839 Module snd-sun-dbri (on sparc only)
1840 -----------------------------------
1842 Module for DBRI sound chips found on Sparcs.
1844 This module supports multiple cards.
1846 Module snd-wavefront
1847 --------------------
1849 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1851 use_cs4232_midi - Use CS4232 MPU-401 interface
1852 (inaccessibly located inside your computer)
1853 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1855 with isapnp=0, the following options are available:
1857 cs4232_pcm_port - Port # for CS4232 PCM interface.
1858 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1859 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1860 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1861 ics2115_port - Port # for ICS2115
1862 ics2115_irq - IRQ # for ICS2115
1863 fm_port - FM OPL-3 Port #
1864 dma1 - DMA1 # for CS4232 PCM interface.
1865 dma2 - DMA2 # for CS4232 PCM interface.
1867 The below are options for wavefront_synth features:
1868 wf_raw - Assume that we need to boot the OS (default:no)
1869 If yes, then during driver loading, the state of the board is
1870 ignored, and we reset the board and load the firmware anyway.
1871 fx_raw - Assume that the FX process needs help (default:yes)
1872 If false, we'll leave the FX processor in whatever state it is
1873 when the driver is loaded. The default is to download the
1874 microprogram and associated coefficients to set it up for
1875 "default" operation, whatever that means.
1876 debug_default - Debug parameters for card initialization
1877 wait_usecs - How long to wait without sleeping, usecs
1879 This magic number seems to give pretty optimal throughput
1880 based on my limited experimentation.
1881 If you want to play around with it and find a better value, be
1882 my guest. Remember, the idea is to get a number that causes us
1883 to just busy wait for as many WaveFront commands as possible,
1884 without coming up with a number so large that we hog the whole
1886 Specifically, with this number, out of about 134,000 status
1887 waits, only about 250 result in a sleep.
1888 sleep_interval - How long to sleep when waiting for reply
1890 sleep_tries - How many times to try sleeping during a wait
1892 ospath - Pathname to processed ICS2115 OS firmware
1893 (default:wavefront.os)
1894 The path name of the ISC2115 OS firmware. In the recent
1895 version, it's handled via firmware loader framework, so it
1896 must be installed in the proper path, typically,
1898 reset_time - How long to wait for a reset to take effect
1900 ramcheck_time - How many seconds to wait for the RAM test
1902 osrun_time - How many seconds to wait for the ICS2115 OS
1905 This module supports multiple cards and ISA PnP.
1907 Note: the firmware file "wavefront.os" was located in the earlier
1908 version in /etc. Now it's loaded via firmware loader, and
1909 must be in the proper firmware path, such as /lib/firmware.
1910 Copy (or symlink) the file appropriately if you get an error
1911 regarding firmware downloading after upgrading the kernel.
1913 Module snd-sonicvibes
1914 ---------------------
1916 Module for S3 SonicVibes PCI sound cards.
1917 * PINE Schubert 32 PCI
1919 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1920 - SoundCard must have onboard SRAM for this.
1921 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1923 This module supports multiple cards and autoprobe.
1925 Module snd-serial-u16550
1926 ------------------------
1928 Module for UART16550A serial MIDI ports.
1930 port - port # for UART16550A chip
1931 irq - IRQ # for UART16550A chip, -1 = poll mode
1932 speed - speed in bauds (9600,19200,38400,57600,115200)
1934 base - base for divisor in bauds (57600,115200,230400,460800)
1936 outs - number of MIDI ports in a serial port (1-4)
1938 adaptor - Type of adaptor.
1939 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1940 3 = MS-124W M/B, 4 = Generic
1942 This module supports multiple cards. This module does not support autoprobe
1943 thus the main port must be specified!!! Other options are optional.
1948 Module for Trident 4DWave DX/NX sound cards.
1949 * Best Union Miss Melody 4DWave PCI
1951 * Warpspeed ONSpeed 4DWave PCI
1954 * CHIC True Sound 4Dwave
1955 * Shark Predator4D-PCI
1956 * Jaton SonicWave 4D
1958 pcm_channels - max channels (voices) reserved for PCM
1959 wavetable_size - max wavetable size in kB (4-?kb)
1961 This module supports multiple cards and autoprobe.
1963 The power-management is supported.
1965 Module snd-usb-audio
1966 --------------------
1968 Module for USB audio and USB MIDI devices.
1970 vid - Vendor ID for the device (optional)
1971 pid - Product ID for the device (optional)
1972 device_setup - Device specific magic number (optional)
1973 - Influence depends on the device
1976 This module supports multiple devices, autoprobe and hotplugging.
1978 Module snd-usb-caiaq
1979 --------------------
1981 Module for caiaq UB audio interfaces,
1982 * Native Instruments RigKontrol2
1983 * Native Instruments Kore Controller
1984 * Native Instruments Audio Kontrol 1
1985 * Native Instruments Audio 8 DJ
1987 This module supports multiple devices, autoprobe and hotplugging.
1989 Module snd-usb-usx2y
1990 --------------------
1992 Module for Tascam USB US-122, US-224 and US-428 devices.
1994 This module supports multiple devices, autoprobe and hotplugging.
1996 Note: you need to load the firmware via usx2yloader utility included
1997 in alsa-tools and alsa-firmware packages.
2002 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
2003 8233A, 8233C, 8235, 8237 (south) bridge.
2005 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
2007 joystick - Enable joystick (default off) [VIA686A/686B only]
2008 ac97_clock - AC'97 codec clock base (default 48000Hz)
2009 dxs_support - support DXS channels,
2010 0 = auto (default), 1 = enable, 2 = disable,
2011 3 = 48k only, 4 = no VRA, 5 = enable any sample
2012 rate and different sample rates on different
2014 [VIA8233/C, 8235, 8237 only]
2015 ac97_quirk - AC'97 workaround for strange hardware
2016 See "AC97 Quirk Option" section below.
2018 This module supports one chip and autoprobe.
2020 Note: on some SMP motherboards like MSI 694D the interrupts might
2021 not be generated properly. In such a case, please try to
2022 set the SMP (or MPS) version on BIOS to 1.1 instead of
2023 default value 1.4. Then the interrupt number will be
2024 assigned under 15. You might also upgrade your BIOS.
2026 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
2027 channels as the first PCM. On these channels, up to 4
2028 streams can be played at the same time, and the controller
2029 can perform sample rate conversion with separate rates for
2031 As default (dxs_support = 0), 48k fixed rate is chosen
2032 except for the known devices since the output is often
2033 noisy except for 48k on some mother boards due to the
2035 Please try once dxs_support=5 and if it works on other
2036 sample rates (e.g. 44.1kHz of mp3 playback), please let us
2037 know the PCI subsystem vendor/device id's (output of
2039 If dxs_support=5 does not work, try dxs_support=4; if it
2040 doesn't work too, try dxs_support=1. (dxs_support=1 is
2041 usually for old motherboards. The correct implemented
2042 board should work with 4 or 5.) If it still doesn't
2043 work and the default setting is ok, dxs_support=3 is the
2044 right choice. If the default setting doesn't work at all,
2045 try dxs_support=2 to disable the DXS channels.
2046 In any cases, please let us know the result and the
2047 subsystem vendor/device ids. See "Links and Addresses"
2050 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
2051 additionally. The mpu_port option is for VIA686 chips only.
2053 The power-management is supported.
2055 Module snd-via82xx-modem
2056 ------------------------
2058 Module for VIA82xx AC97 modem
2060 ac97_clock - AC'97 codec clock base (default 48000Hz)
2062 This module supports one card and autoprobe.
2064 Note: The default index value of this module is -2, i.e. the first
2067 The power-management is supported.
2072 Module for virtual rawmidi devices.
2073 This module creates virtual rawmidi devices which communicate
2074 to the corresponding ALSA sequencer ports.
2076 midi_devs - MIDI devices # (1-4, default=4)
2078 This module supports multiple cards.
2083 Module for sound cards based on the Asus AV200 chip, i.e.,
2084 Xonar D2 and Xonar D2X.
2086 This module supports autoprobe and multiple cards.
2088 Power management is _not_ supported.
2093 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
2095 mic - Enable Microphone on V222 Mic (NYI)
2096 ibl - Capture IBL size. (default = 0, minimum size)
2098 This module supports multiple cards.
2100 When the driver is compiled as a module and the hotplug firmware
2101 is supported, the firmware data is loaded via hotplug automatically.
2102 Install the necessary firmware files in alsa-firmware package.
2103 When no hotplug fw loader is available, you need to load the
2104 firmware via vxloader utility in alsa-tools package. To invoke
2105 vxloader automatically, add the following to /etc/modprobe.conf
2107 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
2109 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
2110 /etc/modules.conf, instead.)
2111 IBL size defines the interrupts period for PCM. The smaller size
2112 gives smaller latency but leads to more CPU consumption, too.
2113 The size is usually aligned to 126. As default (=0), the smallest
2114 size is chosen. The possible IBL values can be found in
2115 /proc/asound/cardX/vx-status proc file.
2117 The power-management is supported.
2122 Module for Digigram VX-Pocket VX2 and 440 PCMCIA cards.
2124 ibl - Capture IBL size. (default = 0, minimum size)
2126 This module supports multiple cards. The module is compiled only when
2127 PCMCIA is supported on kernel.
2129 With the older 2.6.x kernel, to activate the driver via the card
2130 manager, you'll need to set up /etc/pcmcia/vxpocket.conf. See the
2131 sound/pcmcia/vx/vxpocket.c. 2.6.13 or later kernel requires no
2132 longer require a config file.
2134 When the driver is compiled as a module and the hotplug firmware
2135 is supported, the firmware data is loaded via hotplug automatically.
2136 Install the necessary firmware files in alsa-firmware package.
2137 When no hotplug fw loader is available, you need to load the
2138 firmware via vxloader utility in alsa-tools package.
2140 About capture IBL, see the description of snd-vx222 module.
2142 Note: snd-vxp440 driver is merged to snd-vxpocket driver since
2145 The power-management is supported.
2150 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
2152 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
2153 1 (auto-detect for YMF744/754 only)
2154 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
2155 1 (auto-detect for YMF744/754 only)
2156 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
2158 rear_switch - enable shared rear/line-in switch (bool)
2160 This module supports autoprobe and multiple chips.
2162 The power-management is supported.
2164 Module snd-pdaudiocf
2165 --------------------
2167 Module for Sound Core PDAudioCF sound card.
2169 The power-management is supported.
2175 The ac97_quirk option is used to enable/override the workaround for
2176 specific devices on drivers for on-board AC'97 controllers like
2177 snd-intel8x0. Some hardware have swapped output pins between Master
2178 and Headphone, or Surround (thanks to confusion of AC'97
2179 specifications from version to version :-)
2181 The driver provides the auto-detection of known problematic devices,
2182 but some might be unknown or wrongly detected. In such a case, pass
2183 the proper value with this option.
2185 The following strings are accepted:
2186 - default Don't override the default setting
2187 - none Disable the quirk
2188 - hp_only Bind Master and Headphone controls as a single control
2189 - swap_hp Swap headphone and master controls
2190 - swap_surround Swap master and surround controls
2191 - ad_sharing For AD1985, turn on OMS bit and use headphone
2192 - alc_jack For ALC65x, turn on the jack sense mode
2193 - inv_eapd Inverted EAPD implementation
2194 - mute_led Bind EAPD bit for turning on/off mute LED
2196 For backward compatibility, the corresponding integer value -1, 0,
2197 ... are accepted, too.
2199 For example, if "Master" volume control has no effect on your device
2200 but only "Headphone" does, pass ac97_quirk=hp_only module option.
2203 Configuring Non-ISAPNP Cards
2204 ============================
2206 When the kernel is configured with ISA-PnP support, the modules
2207 supporting the isapnp cards will have module options "isapnp".
2208 If this option is set, *only* the ISA-PnP devices will be probed.
2209 For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
2210 together with the proper i/o and irq configuration.
2212 When the kernel is configured without ISA-PnP support, isapnp option
2213 will be not built in.
2216 Module Autoloading Support
2217 ==========================
2219 The ALSA drivers can be loaded automatically on demand by defining
2220 module aliases. The string 'snd-card-%1' is requested for ALSA native
2221 devices where %i is sound card number from zero to seven.
2223 To auto-load an ALSA driver for OSS services, define the string
2224 'sound-slot-%i' where %i means the slot number for OSS, which
2225 corresponds to the card index of ALSA. Usually, define this
2226 as the same card module.
2228 An example configuration for a single emu10k1 card is like below:
2229 ----- /etc/modprobe.conf
2230 alias snd-card-0 snd-emu10k1
2231 alias sound-slot-0 snd-emu10k1
2232 ----- /etc/modprobe.conf
2234 The available number of auto-loaded sound cards depends on the module
2235 option "cards_limit" of snd module. As default it's set to 1.
2236 To enable the auto-loading of multiple cards, specify the number of
2237 sound cards in that option.
2239 When multiple cards are available, it'd better to specify the index
2240 number for each card via module option, too, so that the order of
2241 cards is kept consistent.
2243 An example configuration for two sound cards is like below:
2245 ----- /etc/modprobe.conf
2247 options snd cards_limit=2
2248 alias snd-card-0 snd-interwave
2249 alias snd-card-1 snd-ens1371
2250 options snd-interwave index=0
2251 options snd-ens1371 index=1
2253 alias sound-slot-0 snd-interwave
2254 alias sound-slot-1 snd-ens1371
2255 ----- /etc/modprobe.conf
2257 In this example, the interwave card is always loaded as the first card
2258 (index 0) and ens1371 as the second (index 1).
2260 Alternative (and new) way to fixate the slot assignment is to use
2261 "slots" option of snd module. In the case above, specify like the
2264 options snd slots=snd-interwave,snd-ens1371
2266 Then, the first slot (#0) is reserved for snd-interwave driver, and
2267 the second (#1) for snd-ens1371. You can omit index option in each
2268 driver if slots option is used (although you can still have them at
2269 the same time as long as they don't conflict).
2271 The slots option is especially useful for avoiding the possible
2272 hot-plugging and the resultant slot conflict. For example, in the
2273 case above again, the first two slots are already reserved. If any
2274 other driver (e.g. snd-usb-audio) is loaded before snd-interwave or
2275 snd-ens1371, it will be assigned to the third or later slot.
2277 When a module name is given with '!', the slot will be given for any
2278 modules but that name. For example, "slots=!snd-pcsp" will reserve
2279 the first slot for any modules but snd-pcsp.
2282 ALSA PCM devices to OSS devices mapping
2283 =======================================
2285 /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
2286 /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
2287 /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
2288 /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
2289 /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
2290 /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
2291 /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
2292 /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
2293 /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
2295 The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
2296 sound card number and second means device number. The ALSA devices
2297 have either 'c' or 'p' suffix indicating the direction, capture and
2298 playback, respectively.
2300 Please note that the device mapping above may be varied via the module
2301 options of snd-pcm-oss module.
2304 Proc interfaces (/proc/asound)
2305 ==============================
2307 /proc/asound/card#/pcm#[cp]/oss
2308 -------------------------------
2309 String "erase" - erase all additional informations about OSS applications
2310 String "<app_name> <fragments> <fragment_size> [<options>]"
2312 <app_name> - name of application with (higher priority) or without path
2313 <fragments> - number of fragments or zero if auto
2314 <fragment_size> - size of fragment in bytes or zero if auto
2315 <options> - optional parameters
2316 - disable the application tries to open a pcm device for
2317 this channel but does not want to use it.
2318 (Cause a bug or mmap needs)
2319 It's good for Quake etc...
2320 - direct don't use plugins
2321 - block force block mode (rvplayer)
2322 - non-block force non-block mode
2323 - whole-frag write only whole fragments (optimization affecting
2325 - no-silence do not fill silence ahead to avoid clicks
2326 - buggy-ptr Returns the whitespace blocks in GETOPTR ioctl
2327 instead of filled blocks
2329 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
2330 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
2331 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
2334 Early Buffer Allocation
2335 =======================
2337 Some drivers (e.g. hdsp) require the large contiguous buffers, and
2338 sometimes it's too late to find such spaces when the driver module is
2339 actually loaded due to memory fragmentation. You can pre-allocate the
2340 PCM buffers by loading snd-page-alloc module and write commands to its
2341 proc file in prior, for example, in the early boot stage like
2342 /etc/init.d/*.local scripts.
2344 Reading the proc file /proc/drivers/snd-page-alloc shows the current
2345 usage of page allocation. In writing, you can send the following
2346 commands to the snd-page-alloc driver:
2348 - add VENDOR DEVICE MASK SIZE BUFFERS
2350 VENDOR and DEVICE are PCI vendor and device IDs. They take
2351 integer numbers (0x prefix is needed for the hex).
2352 MASK is the PCI DMA mask. Pass 0 if not restricted.
2353 SIZE is the size of each buffer to allocate. You can pass
2354 k and m suffix for KB and MB. The max number is 16MB.
2355 BUFFERS is the number of buffers to allocate. It must be greater
2356 than 0. The max number is 4.
2360 This will erase the all pre-allocated buffers which are not in
2367 ALSA project homepage
2368 http://www.alsa-project.org
2370 ALSA Bug Tracking System
2371 https://bugtrack.alsa-project.org/bugs/
2374 mailto:alsa-devel@alsa-project.org
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