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.
61 - permission mask for dynamic sound device filesystem
62 - This is available only when DEVFS is enabled
64 - E.g.: device_mode=0660
70 The PCM OSS emulation module.
71 This module takes options which change the mapping of devices.
73 dsp_map - PCM device number maps assigned to the 1st OSS device.
75 adsp_map - PCM device number maps assigned to the 2st OSS device.
78 - Don't block opening busy PCM devices. Default: 1
80 For example, when dsp_map=2, /dev/dsp will be mapped to PCM #2 of
81 the card #0. Similarly, when adsp_map=0, /dev/adsp will be mapped
82 to PCM #0 of the card #0.
83 For changing the second or later card, specify the option with
84 commas, such like "dsp_map=0,1".
86 nonblock_open option is used to change the behavior of the PCM
87 regarding opening the device. When this option is non-zero,
88 opening a busy OSS PCM device won't be blocked but return
89 immediately with EAGAIN (just like O_NONBLOCK flag).
94 This module takes options which change the mapping of devices.
95 similar to those of the snd-pcm-oss module.
97 midi_map - MIDI device number maps assigned to the 1st OSS device.
99 amidi_map - MIDI device number maps assigned to the 2st OSS device.
102 Common parameters for top sound card modules
103 --------------------------------------------
105 Each of top level sound card module takes the following options.
107 index - index (slot #) of sound card
108 - Values: 0 through 31 or negative
109 - If nonnegative, assign that index number
110 - if negative, interpret as a bitmask of permissible
111 indices; the first free permitted index is assigned
113 id - card ID (identifier or name)
114 - Can be up to 15 characters long
115 - Default: the card type
116 - A directory by this name is created under /proc/asound/
117 containing information about the card
118 - This ID can be used instead of the index number in
121 - Default: enabled, for PCI and ISA PnP cards
126 Module for sound cards based on Analog Devices AD1816A/AD1815 ISA chips.
128 port - port # for AD1816A chip (PnP setup)
129 mpu_port - port # for MPU-401 UART (PnP setup)
130 fm_port - port # for OPL3 (PnP setup)
131 irq - IRQ # for AD1816A chip (PnP setup)
132 mpu_irq - IRQ # for MPU-401 UART (PnP setup)
133 dma1 - first DMA # for AD1816A chip (PnP setup)
134 dma2 - second DMA # for AD1816A chip (PnP setup)
135 clockfreq - Clock frequency for AD1816A chip (default = 0, 33000Hz)
137 This module supports multiple cards, autoprobe and PnP.
142 Module for sound cards based on AD1848/AD1847/CS4248 ISA chips.
144 port - port # for AD1848 chip
145 irq - IRQ # for AD1848 chip
146 dma1 - DMA # for AD1848 chip (0,1,3)
148 This module supports multiple cards. It does not support autoprobe
149 thus main port must be specified!!! Other ports are optional.
151 The power-management is supported.
156 Module for Analog Devices AD1889 chips.
158 ac97_quirk - AC'97 workaround for strange hardware
159 See the description of intel8x0 module for details.
161 This module supports multiple cards.
166 Module for ALi M5451 PCI chip.
168 pcm_channels - Number of hardware channels assigned for PCM
169 spdif - Support SPDIF I/O
172 This module supports one chip and autoprobe.
174 The power-management is supported.
179 Module for sound cards based on Avance Logic ALS100/ALS120 ISA chips.
181 port - port # for ALS100 (SB16) chip (PnP setup)
182 irq - IRQ # for ALS100 (SB16) chip (PnP setup)
183 dma8 - 8-bit DMA # for ALS100 (SB16) chip (PnP setup)
184 dma16 - 16-bit DMA # for ALS100 (SB16) chip (PnP setup)
185 mpu_port - port # for MPU-401 UART (PnP setup)
186 mpu_irq - IRQ # for MPU-401 (PnP setup)
187 fm_port - port # for OPL3 FM (PnP setup)
189 This module supports multiple cards, autoprobe and PnP.
191 The power-management is supported.
196 Module for sound cards based on Avance Logic ALS4000 PCI chip.
198 joystick_port - port # for legacy joystick support.
199 0 = disabled (default), 1 = auto-detect
201 This module supports multiple cards, autoprobe and PnP.
203 The power-management is supported.
208 Module for ATI IXP 150/200/250/400 AC97 controllers.
210 ac97_clock - AC'97 clock (default = 48000)
211 ac97_quirk - AC'97 workaround for strange hardware
212 See "AC97 Quirk Option" section below.
213 spdif_aclink - S/PDIF transfer over AC-link (default = 1)
215 This module supports one card and autoprobe.
217 ATI IXP has two different methods to control SPDIF output. One is
218 over AC-link and another is over the "direct" SPDIF output. The
219 implementation depends on the motherboard, and you'll need to
220 choose the correct one via spdif_aclink module option.
222 The power-management is supported.
224 Module snd-atiixp-modem
225 -----------------------
227 Module for ATI IXP 150/200/250 AC97 modem controllers.
229 This module supports one card and autoprobe.
231 Note: The default index value of this module is -2, i.e. the first
234 The power-management is supported.
236 Module snd-au8810, snd-au8820, snd-au8830
237 -----------------------------------------
239 Module for Aureal Vortex, Vortex2 and Advantage device.
241 pcifix - Control PCI workarounds
242 0 = Disable all workarounds
243 1 = Force the PCI latency of the Aureal card to 0xff
244 2 = Force the Extend PCI#2 Internal Master for Efficient
245 Handling of Dummy Requests on the VIA KT133 AGP Bridge
246 3 = Force both settings
247 255 = Autodetect what is required (default)
249 This module supports all ADB PCM channels, ac97 mixer, SPDIF, hardware
250 EQ, mpu401, gameport. A3D and wavetable support are still in development.
251 Development and reverse engineering work is being coordinated at
252 http://savannah.nongnu.org/projects/openvortex/
253 SPDIF output has a copy of the AC97 codec output, unless you use the
254 "spdif" pcm device, which allows raw data passthru.
255 The hardware EQ hardware and SPDIF is only present in the Vortex2 and
258 Note: Some ALSA mixer applications don't handle the SPDIF sample rate
259 control correctly. If you have problems regarding this, try
260 another ALSA compliant mixer (alsamixer works).
265 Module for sound cards based on Aztech System AZT2320 ISA chip (PnP only).
267 port - port # for AZT2320 chip (PnP setup)
268 wss_port - port # for WSS (PnP setup)
269 mpu_port - port # for MPU-401 UART (PnP setup)
270 fm_port - FM port # for AZT2320 chip (PnP setup)
271 irq - IRQ # for AZT2320 (WSS) chip (PnP setup)
272 mpu_irq - IRQ # for MPU-401 UART (PnP setup)
273 dma1 - 1st DMA # for AZT2320 (WSS) chip (PnP setup)
274 dma2 - 2nd DMA # for AZT2320 (WSS) chip (PnP setup)
276 This module supports multiple cards, PnP and autoprobe.
278 The power-management is supported.
283 Module for sound cards based on Aztech AZF3328 PCI chip.
285 joystick - Enable joystick (default off)
287 This module supports multiple cards.
292 Module for video cards based on Bt87x chips.
294 digital_rate - Override the default digital rate (Hz)
295 load_all - Load the driver even if the card model isn't known
297 This module supports multiple cards.
299 Note: The default index value of this module is -2, i.e. the first
305 Module for Creative Audigy LS and SB Live 24bit
307 This module supports multiple cards.
313 Module for sound cards based on C-Media CMI8330 ISA chips.
315 wssport - port # for CMI8330 chip (WSS)
316 wssirq - IRQ # for CMI8330 chip (WSS)
317 wssdma - first DMA # for CMI8330 chip (WSS)
318 sbport - port # for CMI8330 chip (SB16)
319 sbirq - IRQ # for CMI8330 chip (SB16)
320 sbdma8 - 8bit DMA # for CMI8330 chip (SB16)
321 sbdma16 - 16bit DMA # for CMI8330 chip (SB16)
323 This module supports multiple cards and autoprobe.
325 The power-management is supported.
330 Module for C-Media CMI8338 and 8738 PCI sound cards.
332 mpu_port - 0x300,0x310,0x320,0x330, 0 = disable (default)
333 fm_port - 0x388 (default), 0 = disable (default)
334 soft_ac3 - Software-conversion of raw SPDIF packets (model 033 only)
336 joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
338 This module supports autoprobe and multiple cards.
340 The power-management is supported.
345 Module for sound cards based on CS4231 ISA chips.
347 port - port # for CS4231 chip
348 mpu_port - port # for MPU-401 UART (optional), -1 = disable
349 irq - IRQ # for CS4231 chip
350 mpu_irq - IRQ # for MPU-401 UART
351 dma1 - first DMA # for CS4231 chip
352 dma2 - second DMA # for CS4231 chip
354 This module supports multiple cards. This module does not support autoprobe
355 thus main port must be specified!!! Other ports are optional.
357 The power-management is supported.
362 Module for sound cards based on CS4232/CS4232A ISA chips.
364 port - port # for CS4232 chip (PnP setup - 0x534)
365 cport - control port # for CS4232 chip (PnP setup - 0x120,0x210,0xf00)
366 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
367 fm_port - FM port # for CS4232 chip (PnP setup - 0x388), -1 = disable
368 irq - IRQ # for CS4232 chip (5,7,9,11,12,15)
369 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
370 dma1 - first DMA # for CS4232 chip (0,1,3)
371 dma2 - second DMA # for Yamaha CS4232 chip (0,1,3), -1 = disable
372 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
374 This module supports multiple cards. This module does not support autoprobe
375 thus main port must be specified!!! Other ports are optional.
377 The power-management is supported.
382 Module for sound cards based on CS4235/CS4236/CS4236B/CS4237B/
383 CS4238B/CS4239 ISA chips.
385 port - port # for CS4236 chip (PnP setup - 0x534)
386 cport - control port # for CS4236 chip (PnP setup - 0x120,0x210,0xf00)
387 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
388 fm_port - FM port # for CS4236 chip (PnP setup - 0x388), -1 = disable
389 irq - IRQ # for CS4236 chip (5,7,9,11,12,15)
390 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
391 dma1 - first DMA # for CS4236 chip (0,1,3)
392 dma2 - second DMA # for CS4236 chip (0,1,3), -1 = disable
393 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
395 This module supports multiple cards. This module does not support autoprobe
396 (if ISA PnP is not used) thus main port and control port must be
397 specified!!! Other ports are optional.
399 The power-management is supported.
404 Module for Cirrus Logic CS4281 soundchip.
406 dual_codec - Secondary codec ID (0 = disable, default)
408 This module supports multiple cards.
410 The power-management is supported.
415 Module for PCI sound cards based on CS4610/CS4612/CS4614/CS4615/CS4622/
416 CS4624/CS4630/CS4280 PCI chips.
418 external_amp - Force to enable external amplifier.
419 thinkpad - Force to enable Thinkpad's CLKRUN control.
420 mmap_valid - Support OSS mmap mode (default = 0).
422 This module supports multiple cards and autoprobe.
423 Usually external amp and CLKRUN controls are detected automatically
424 from PCI sub vendor/device ids. If they don't work, give the options
427 The power-management is supported.
429 Module snd-cs5535audio
430 ----------------------
432 Module for multifunction CS5535 companion PCI device
434 This module supports multiple cards.
439 Module for Diamond Technologies DT-019X / Avance Logic ALS-007 (PnP
442 port - Port # (PnP setup)
443 mpu_port - Port # for MPU-401 (PnP setup)
444 fm_port - Port # for FM OPL-3 (PnP setup)
445 irq - IRQ # (PnP setup)
446 mpu_irq - IRQ # for MPU-401 (PnP setup)
447 dma8 - DMA # (PnP setup)
449 This module supports multiple cards. This module is enabled only with
452 The power-management is supported.
457 Module for the dummy sound card. This "card" doesn't do any output
458 or input, but you may use this module for any application which
459 requires a sound card (like RealPlayer).
461 The power-management is supported.
466 Module for EMU10K1/EMU10k2 based PCI sound cards.
467 * Sound Blaster Live!
468 * Sound Blaster PCI 512
469 * Emu APS (partially supported)
470 * Sound Blaster Audigy
472 extin - bitmap of available external inputs for FX8010 (see bellow)
473 extout - bitmap of available external outputs for FX8010 (see bellow)
474 seq_ports - allocated sequencer ports (4 by default)
475 max_synth_voices - limit of voices used for wavetable (64 by default)
476 max_buffer_size - specifies the maximum size of wavetable/pcm buffers
477 given in MB unit. Default value is 128.
478 enable_ir - enable IR
480 This module supports multiple cards and autoprobe.
482 Input & Output configurations [extin/extout]
483 * Creative Card wo/Digital out [0x0003/0x1f03]
484 * Creative Card w/Digital out [0x0003/0x1f0f]
485 * Creative Card w/Digital CD in [0x000f/0x1f0f]
486 * Creative Card wo/Digital out + LiveDrive [0x3fc3/0x1fc3]
487 * Creative Card w/Digital out + LiveDrive [0x3fc3/0x1fcf]
488 * Creative Card w/Digital CD in + LiveDrive [0x3fcf/0x1fcf]
489 * Creative Card wo/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
490 * Creative Card w/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
491 * Creative Card w/Digital CD in + Digital I/O 2 [0x0fcf/0x1f0f]
492 * Creative Card 5.1/w Digital out + LiveDrive [0x3fc3/0x1fff]
493 * Creative Card 5.1 (c) 2003 [0x3fc3/0x7cff]
494 * Creative Card all ins and outs [0x3fff/0x7fff]
496 The power-management is supported.
501 Module for Creative Emu10k1X (SB Live Dell OEM version)
503 This module supports multiple cards.
508 Module for Ensoniq AudioPCI ES1370 PCI sound cards.
509 * SoundBlaster PCI 64
510 * SoundBlaster PCI 128
512 joystick - Enable joystick (default off)
514 This module supports multiple cards and autoprobe.
516 The power-management is supported.
521 Module for Ensoniq AudioPCI ES1371 PCI sound cards.
522 * SoundBlaster PCI 64
523 * SoundBlaster PCI 128
524 * SoundBlaster Vibra PCI
526 joystick_port - port # for joystick (0x200,0x208,0x210,0x218),
527 0 = disable (default), 1 = auto-detect
529 This module supports multiple cards and autoprobe.
531 The power-management is supported.
536 Module for sound cards based on ESS ES968 chip (PnP only).
538 port - port # for ES968 (SB8) chip (PnP setup)
539 irq - IRQ # for ES968 (SB8) chip (PnP setup)
540 dma1 - DMA # for ES968 (SB8) chip (PnP setup)
542 This module supports multiple cards, PnP and autoprobe.
544 The power-management is supported.
549 Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
551 port - port # for ES-1688 chip (0x220,0x240,0x260)
552 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
553 irq - IRQ # for ES-1688 chip (5,7,9,10)
554 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
555 dma8 - DMA # for ES-1688 chip (0,1,3)
557 This module supports multiple cards and autoprobe (without MPU-401 port).
562 Module for ESS AudioDrive ES-18xx sound cards.
564 port - port # for ES-18xx chip (0x220,0x240,0x260)
565 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
566 fm_port - port # for FM (optional, not used)
567 irq - IRQ # for ES-18xx chip (5,7,9,10)
568 dma1 - first DMA # for ES-18xx chip (0,1,3)
569 dma2 - first DMA # for ES-18xx chip (0,1,3)
570 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
572 This module supports multiple cards, ISA PnP and autoprobe (without MPU-401
573 port if native ISA PnP routines are not used).
574 When dma2 is equal with dma1, the driver works as half-duplex.
576 The power-management is supported.
581 Module for sound cards based on ESS Solo-1 (ES1938,ES1946) chips.
583 This module supports multiple cards and autoprobe.
585 The power-management is supported.
590 Module for sound cards based on ESS Maestro-1/2/2E (ES1968/ES1978) chips.
592 total_bufsize - total buffer size in kB (1-4096kB)
593 pcm_substreams_p - playback channels (1-8, default=2)
594 pcm_substreams_c - capture channels (1-8, default=0)
595 clock - clock (0 = auto-detection)
596 use_pm - support the power-management (0 = off, 1 = on,
598 enable_mpu - enable MPU401 (0 = off, 1 = on, 2 = auto (default))
599 joystick - enable joystick (default off)
601 This module supports multiple cards and autoprobe.
603 The power-management is supported.
608 Module for ForteMedia FM801 based PCI sound cards.
610 tea575x_tuner - Enable TEA575x tuner
611 - 1 = MediaForte 256-PCS
612 - 2 = MediaForte 256-PCPR
613 - 3 = MediaForte 64-PCR
614 - High 16-bits are video (radio) device number + 1
615 - example: 0x10002 (MediaForte 256-PCPR, device 1)
617 This module supports multiple cards and autoprobe.
619 The power-management is supported.
621 Module snd-gusclassic
622 ---------------------
624 Module for Gravis UltraSound Classic sound card.
626 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
627 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
628 dma1 - DMA # for GF1 chip (1,3,5,6,7)
629 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
630 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
631 voices - GF1 voices limit (14-32)
632 pcm_voices - reserved PCM voices
634 This module supports multiple cards and autoprobe.
636 Module snd-gusextreme
637 ---------------------
639 Module for Gravis UltraSound Extreme (Synergy ViperMax) sound card.
641 port - port # for ES-1688 chip (0x220,0x230,0x240,0x250,0x260)
642 gf1_port - port # for GF1 chip (0x210,0x220,0x230,0x240,0x250,0x260,0x270)
643 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable
644 irq - IRQ # for ES-1688 chip (5,7,9,10)
645 gf1_irq - IRQ # for GF1 chip (3,5,9,11,12,15)
646 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
647 dma8 - DMA # for ES-1688 chip (0,1,3)
648 dma1 - DMA # for GF1 chip (1,3,5,6,7)
649 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
650 voices - GF1 voices limit (14-32)
651 pcm_voices - reserved PCM voices
653 This module supports multiple cards and autoprobe (without MPU-401 port).
658 Module for Gravis UltraSound MAX sound card.
660 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
661 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
662 dma1 - DMA # for GF1 chip (1,3,5,6,7)
663 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
664 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
665 voices - GF1 voices limit (14-32)
666 pcm_voices - reserved PCM voices
668 This module supports multiple cards and autoprobe.
673 Module for Intel HD Audio (ICH6, ICH6M, ICH7), ATI SB450,
676 model - force the model name
677 position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size)
678 single_cmd - Use single immediate commands to communicate with
679 codecs (for debugging only)
681 This module supports one card and autoprobe.
683 Each codec may have a model table for different configurations.
684 If your machine isn't listed there, the default (usually minimal)
685 configuration is set up. You can pass "model=<name>" option to
686 specify a certain model in such a case. There are different
687 models depending on the codec chip.
689 Model name Description
690 ---------- -----------
692 3stack 3-jack in back and a headphone out
693 3stack-digout 3-jack in back, a HP out and a SPDIF out
694 5stack 5-jack in back, 2-jack in front
695 5stack-digout 5-jack in back, 2-jack in front, a SPDIF out
696 6stack 6-jack in back, 2-jack in front
697 6stack-digout 6-jack with a SPDIF out
699 z71v 3-jack (HP shared SPDIF)
703 test for testing/debugging purpose, almost all controls can be
704 adjusted. Appearing only when compiled with
709 fujitsu Fujitsu S7020
712 minimal 3-jack in back
713 min_fp 3-jack in back, 2-jack in front
714 full 6-jack in back, 2-jack in front
715 full_dig 6-jack in back, 2-jack in front, SPDIF I/O
716 allout 5-jack in back, 2-jack in front, SPDIF out
717 auto auto-config reading BIOS (default)
719 If the default configuration doesn't work and one of the above
720 matches with your device, report it together with the PCI
721 subsystem ID (output of "lspci -nv") to ALSA BTS or alsa-devel
722 ML (see the section "Links and Addresses").
724 Note 2: If you get click noises on output, try the module option
725 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
726 register value without FIFO size correction as the current
727 DMA pointer. position_fix=2 will make the driver to use
728 the position buffer instead of reading SD_LPIB register.
729 (Usually SD_LPLIB register is more accurate than the
732 NB: If you get many "azx_get_response timeout" messages at
733 loading, it's likely a problem of interrupts (e.g. ACPI irq
734 routing). Try to boot with options like "pci=noacpi". Also, you
735 can try "single_cmd=1" module option. This will switch the
736 communication method between HDA controller and codecs to the
737 single immediate commands instead of CORB/RIRB. Basically, the
738 single command mode is provided only for BIOS, and you won't get
739 unsolicited events, too. But, at least, this works independently
740 from the irq. Remember this is a last resort, and should be
741 avoided as much as possible...
743 The power-management is supported.
748 Module for RME Hammerfall DSP audio interface(s)
750 This module supports multiple cards.
752 Note: The firmware data can be automatically loaded via hotplug
753 when CONFIG_FW_LOADER is set. Otherwise, you need to load
754 the firmware via hdsploader utility included in alsa-tools
756 The firmware data is found in alsa-firmware package.
758 Note: snd-page-alloc module does the job which snd-hammerfall-mem
759 module did formerly. It will allocate the buffers in advance
760 when any HDSP cards are found. To make the buffer
761 allocation sure, load snd-page-alloc module in the early
762 stage of boot sequence. See "Early Buffer Allocation"
768 Module for RME HDSP MADI board.
770 precise_ptr - Enable precise pointer, or disable.
771 line_outs_monitor - Send playback streams to analog outs by default.
772 enable_monitor - Enable Analog Out on Channel 63/64 by default.
774 See hdspm.txt for details.
779 Module for Envy24 (ICE1712) based PCI sound cards.
780 * MidiMan M Audio Delta 1010
781 * MidiMan M Audio Delta 1010LT
782 * MidiMan M Audio Delta DiO 2496
783 * MidiMan M Audio Delta 66
784 * MidiMan M Audio Delta 44
785 * MidiMan M Audio Delta 410
786 * MidiMan M Audio Audiophile 2496
792 * Hoontech SoundTrack DSP 24
793 * Hoontech SoundTrack DSP 24 Value
794 * Hoontech SoundTrack DSP 24 Media 7.1
795 * Event Electronics, EZ8
797 * Lionstracs, Mediastaton
799 model - Use the given board model, one of the following:
800 delta1010, dio2496, delta66, delta44, audiophile, delta410,
801 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
802 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
803 phase88, mediastation
804 omni - Omni I/O support for MidiMan M-Audio Delta44/66
805 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transciever)
806 in msec resolution, default value is 500 (0.5 sec)
808 This module supports multiple cards and autoprobe. Note: The consumer part
809 is not used with all Envy24 based cards (for example in the MidiMan Delta
812 Note: The supported board is detected by reading EEPROM or PCI
813 SSID (if EEPROM isn't available). You can override the
814 model by passing "model" module option in case that the
815 driver isn't configured properly or you want to try another
821 Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
822 * MidiMan M Audio Revolution 5.1
823 * MidiMan M Audio Revolution 7.1
825 * TerraTec Aureon 5.1 Sky
826 * TerraTec Aureon 7.1 Space
827 * TerraTec Aureon 7.1 Universe
830 * AudioTrak Prodigy 7.1
831 * AudioTrak Prodigy 7.1LT
832 * AudioTrak Prodigy 192
834 * Albatron K8X800 Pro II
841 model - Use the given board model, one of the following:
842 revo51, revo71, amp2000, prodigy71, prodigy71lt,
843 prodigy192, aureon51, aureon71, universe,
844 k8x800, phase22, phase28, ms300, av710
846 This module supports multiple cards and autoprobe.
848 Note: The supported board is detected by reading EEPROM or PCI
849 SSID (if EEPROM isn't available). You can override the
850 model by passing "model" module option in case that the
851 driver isn't configured properly or you want to try another
857 Module for AC'97 motherboards from Intel and compatibles.
858 * Intel i810/810E, i815, i820, i830, i84x, MX440
859 ICH5, ICH6, ICH7, ESB2
861 * NVidia NForce, NForce2, NForce3, MCP04, CK804
863 * AMD AMD768, AMD8111
866 ac97_clock - AC'97 codec clock base (0 = auto-detect)
867 ac97_quirk - AC'97 workaround for strange hardware
868 See "AC97 Quirk Option" section below.
869 buggy_irq - Enable workaround for buggy interrupts on some
870 motherboards (default yes on nForce chips,
872 buggy_semaphore - Enable workaround for hardwares with buggy
873 semaphores (e.g. on some ASUS laptops)
876 This module supports one chip and autoprobe.
878 Note: the latest driver supports auto-detection of chip clock.
879 if you still encounter too fast playback, specify the clock
880 explicitly via the module option "ac97_clock=41194".
882 Joystick/MIDI ports are not supported by this driver. If your
883 motherboard has these devices, use the ns558 or snd-mpu401
884 modules, respectively.
886 The power-management is supported.
891 Module for Intel ICH (i8x0) chipset MC97 modems.
892 * Intel i810/810E, i815, i820, i830, i84x, MX440
895 * NVidia NForce, NForce2, NForce2s, NForce3
899 ac97_clock - AC'97 codec clock base (0 = auto-detect)
901 This module supports one card and autoprobe.
903 Note: The default index value of this module is -2, i.e. the first
906 The power-management is supported.
911 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
912 and other sound cards based on AMD InterWave (tm) chip.
914 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
915 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
916 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
917 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
918 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
919 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
920 pcm_voices - reserved PCM voices for the synthesizer (default 2)
921 effect - 1 = InterWave effects enable (default 0);
924 This module supports multiple cards, autoprobe and ISA PnP.
926 Module snd-interwave-stb
927 ------------------------
929 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
930 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
931 circuit for extended control of bass, treble and master volume.
933 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
934 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
935 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
936 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
937 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
938 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
939 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
940 pcm_voices - reserved PCM voices for the synthesizer (default 2)
941 effect - 1 = InterWave effects enable (default 0);
944 This module supports multiple cards, autoprobe and ISA PnP.
949 Module for Korg 1212 IO PCI card
951 This module supports multiple cards.
956 Module for Allegro/Maestro3 chips
958 external_amp - enable external amp (enabled by default)
959 amp_gpio - GPIO pin number for external amp (0-15) or
960 -1 for default pin (8 for allegro, 1 for
963 This module supports autoprobe and multiple chips.
965 Note: the binding of amplifier is dependent on hardware.
966 If there is no sound even though all channels are unmuted, try to
967 specify other gpio connection via amp_gpio option.
968 For example, a Panasonic notebook might need "amp_gpio=0x0d"
971 The power-management is supported.
976 Module for Digigram miXart8 sound cards.
978 This module supports multiple cards.
979 Note: One miXart8 board will be represented as 4 alsa cards.
980 See MIXART.txt for details.
982 When the driver is compiled as a module and the hotplug firmware
983 is supported, the firmware data is loaded via hotplug automatically.
984 Install the necessary firmware files in alsa-firmware package.
985 When no hotplug fw loader is available, you need to load the
986 firmware via mixartloader utility in alsa-tools package.
991 Module for MPU-401 UART devices.
993 port - port number or -1 (disable)
994 irq - IRQ number or -1 (disable)
995 pnp - PnP detection - 0 = disable, 1 = enable (default)
997 This module supports multiple devices and PnP.
1002 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
1005 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
1006 irq - IRQ # for MTPAV (7,5, default=7)
1007 hwports - number of supported hardware ports, default=8.
1009 Module supports only 1 card. This module has no enable option.
1014 Module for NeoMagic NM256AV/ZX chips
1016 playback_bufsize - max playback frame size in kB (4-128kB)
1017 capture_bufsize - max capture frame size in kB (4-128kB)
1018 force_ac97 - 0 or 1 (disabled by default)
1019 buffer_top - specify buffer top address
1020 use_cache - 0 or 1 (disabled by default)
1021 vaio_hack - alias buffer_top=0x25a800
1022 reset_workaround - enable AC97 RESET workaround for some laptops
1023 reset_workaround2 - enable extended AC97 RESET workaround for some
1026 This module supports one chip and autoprobe.
1028 The power-management is supported.
1030 Note: on some notebooks the buffer address cannot be detected
1031 automatically, or causes hang-up during initialization.
1032 In such a case, specify the buffer top address explicity via
1035 Sony F250: buffer_top=0x25a800
1036 Sony F270: buffer_top=0x272800
1037 The driver supports only ac97 codec. It's possible to force
1038 to initialize/use ac97 although it's not detected. In such a
1039 case, use force_ac97=1 option - but *NO* guarantee whether it
1042 Note: The NM256 chip can be linked internally with non-AC97
1043 codecs. This driver supports only the AC97 codec, and won't work
1044 with machines with other (most likely CS423x or OPL3SAx) chips,
1045 even though the device is detected in lspci. In such a case, try
1046 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
1047 but some doesn't have ISA PnP. You'll need to specify isapnp=0
1048 and proper hardware parameters in the case without ISA PnP.
1050 Note: some laptops need a workaround for AC97 RESET. For the
1051 known hardware like Dell Latitude LS and Sony PCG-F305, this
1052 workaround is enabled automatically. For other laptops with a
1053 hard freeze, you can try reset_workaround=1 option.
1055 Note: Dell Latitude CSx laptops have another problem regarding
1056 AC97 RESET. On these laptops, reset_workaround2 option is
1057 turned on as default. This option is worth to try if the
1058 previous reset_workaround option doesn't help.
1060 Note: This driver is really crappy. It's a porting from the
1061 OSS driver, which is a result of black-magic reverse engineering.
1062 The detection of codec will fail if the driver is loaded *after*
1063 X-server as described above. You might be able to force to load
1064 the module, but it may result in hang-up. Hence, make sure that
1065 you load this module *before* X if you encounter this kind of
1071 Module for Yamaha OPL3-SA2/SA3 sound cards.
1073 port - control port # for OPL3-SA chip (0x370)
1074 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
1075 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
1076 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1077 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
1078 irq - IRQ # for OPL3-SA chip (5,7,9,10)
1079 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
1080 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
1081 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1083 This module supports multiple cards and ISA PnP. It does not support
1084 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
1086 The power-management is supported.
1088 Module snd-opti92x-ad1848
1089 -------------------------
1091 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
1092 Module works with OAK Mozart cards as well.
1094 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1095 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1096 fm_port - port # for OPL3 device (0x388)
1097 irq - IRQ # for WSS chip (5,7,9,10,11)
1098 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1099 dma1 - first DMA # for WSS chip (0,1,3)
1101 This module supports only one card, autoprobe and PnP.
1103 Module snd-opti92x-cs4231
1104 -------------------------
1106 Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
1108 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1109 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1110 fm_port - port # for OPL3 device (0x388)
1111 irq - IRQ # for WSS chip (5,7,9,10,11)
1112 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1113 dma1 - first DMA # for WSS chip (0,1,3)
1114 dma2 - second DMA # for WSS chip (0,1,3)
1116 This module supports only one card, autoprobe and PnP.
1121 Module for sound cards based on OPTi 82c93x chips.
1123 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1124 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1125 fm_port - port # for OPL3 device (0x388)
1126 irq - IRQ # for WSS chip (5,7,9,10,11)
1127 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1128 dma1 - first DMA # for WSS chip (0,1,3)
1129 dma2 - second DMA # for WSS chip (0,1,3)
1131 This module supports only one card, autoprobe and PnP.
1136 Module for Digigram PCXHR boards
1138 This module supports multiple cards.
1140 Module snd-powermac (on ppc only)
1141 ---------------------------------
1143 Module for PowerMac, iMac and iBook on-board soundchips
1145 enable_beep - enable beep using PCM (enabled as default)
1147 Module supports autoprobe a chip.
1149 Note: the driver may have problems regarding endianess.
1151 The power-management is supported.
1153 Module snd-pxa2xx-ac97 (on arm only)
1154 ------------------------------------
1156 Module for AC97 driver for the Intel PXA2xx chip
1158 For ARM architecture only.
1160 The power-management is supported.
1165 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1166 Prodif96 and Prodif Gold) sound cards.
1168 This module supports multiple cards.
1173 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1175 This module supports multiple cards.
1180 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1182 precise_ptr - Enable precise pointer (doesn't work reliably).
1185 This module supports multiple cards.
1187 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1188 module did formerly. It will allocate the buffers in advance
1189 when any RME9652 cards are found. To make the buffer
1190 allocation sure, load snd-page-alloc module in the early
1191 stage of boot sequence. See "Early Buffer Allocation"
1194 Module snd-sa11xx-uda1341 (on arm only)
1195 ---------------------------------------
1197 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1199 Module supports only one card.
1200 Module has no enable and index options.
1202 The power-management is supported.
1207 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1211 port - port # for SB DSP chip (0x220,0x240,0x260)
1212 irq - IRQ # for SB DSP chip (5,7,9,10)
1213 dma8 - DMA # for SB DSP chip (1,3)
1215 This module supports multiple cards and autoprobe.
1217 The power-management is supported.
1219 Module snd-sb16 and snd-sbawe
1220 -----------------------------
1222 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1223 SoundBlaster AWE 32 (PnP),
1224 SoundBlaster AWE 64 PnP
1226 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1227 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1228 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1229 (snd-sbawe module only)
1230 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1231 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1232 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1233 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1234 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1235 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1237 This module supports multiple cards, autoprobe and ISA PnP.
1239 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1240 disable 16bit DMA with dma16 = -1 module parameter.
1241 Also, all Sound Blaster 16 type cards can operate in 16-bit
1242 half duplex mode through 8-bit DMA channel by disabling their
1245 The power-management is supported.
1250 Module for Aztech Sound Galaxy sound card.
1252 sbport - Port # for SB16 interface (0x220,0x240)
1253 wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
1254 irq - IRQ # (7,9,10,11)
1257 This module supports multiple cards.
1259 The power-management is supported.
1264 Module for ENSONIQ SoundScape PnP cards.
1266 port - Port # (PnP setup)
1267 irq - IRQ # (PnP setup)
1268 mpu_irq - MPU-401 IRQ # (PnP setup)
1269 dma - DMA # (PnP setup)
1271 This module supports multiple cards. ISA PnP must be enabled.
1272 You need sscape_ctl tool in alsa-tools package for loading
1275 Module snd-sun-amd7930 (on sparc only)
1276 --------------------------------------
1278 Module for AMD7930 sound chips found on Sparcs.
1280 This module supports multiple cards.
1282 Module snd-sun-cs4231 (on sparc only)
1283 -------------------------------------
1285 Module for CS4231 sound chips found on Sparcs.
1287 This module supports multiple cards.
1289 Module snd-sun-dbri (on sparc only)
1290 -----------------------------------
1292 Module for DBRI sound chips found on Sparcs.
1294 This module supports multiple cards.
1296 Module snd-wavefront
1297 --------------------
1299 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1301 cs4232_pcm_port - Port # for CS4232 PCM interface.
1302 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1303 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1304 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1305 use_cs4232_midi - Use CS4232 MPU-401 interface
1306 (inaccessibly located inside your computer)
1307 ics2115_port - Port # for ICS2115
1308 ics2115_irq - IRQ # for ICS2115
1309 fm_port - FM OPL-3 Port #
1310 dma1 - DMA1 # for CS4232 PCM interface.
1311 dma2 - DMA2 # for CS4232 PCM interface.
1312 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1314 This module supports multiple cards and ISA PnP.
1316 Module snd-sonicvibes
1317 ---------------------
1319 Module for S3 SonicVibes PCI sound cards.
1320 * PINE Schubert 32 PCI
1322 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1323 - SoundCard must have onboard SRAM for this.
1324 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1326 This module supports multiple cards and autoprobe.
1328 Module snd-serial-u16550
1329 ------------------------
1331 Module for UART16550A serial MIDI ports.
1333 port - port # for UART16550A chip
1334 irq - IRQ # for UART16550A chip, -1 = poll mode
1335 speed - speed in bauds (9600,19200,38400,57600,115200)
1337 base - base for divisor in bauds (57600,115200,230400,460800)
1339 outs - number of MIDI ports in a serial port (1-4)
1341 adaptor - Type of adaptor.
1342 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1343 3 = MS-124W M/B, 4 = Generic
1345 This module supports multiple cards. This module does not support autoprobe
1346 thus the main port must be specified!!! Other options are optional.
1351 Module for Trident 4DWave DX/NX sound cards.
1352 * Best Union Miss Melody 4DWave PCI
1354 * Warpspeed ONSpeed 4DWave PCI
1357 * CHIC True Sound 4Dwave
1358 * Shark Predator4D-PCI
1359 * Jaton SonicWave 4D
1361 pcm_channels - max channels (voices) reserved for PCM
1362 wavetable_size - max wavetable size in kB (4-?kb)
1364 This module supports multiple cards and autoprobe.
1366 The power-management is supported.
1368 Module snd-usb-audio
1369 --------------------
1371 Module for USB audio and USB MIDI devices.
1373 vid - Vendor ID for the device (optional)
1374 pid - Product ID for the device (optional)
1376 This module supports multiple devices, autoprobe and hotplugging.
1378 Module snd-usb-usx2y
1379 --------------------
1381 Module for Tascam USB US-122, US-224 and US-428 devices.
1383 This module supports multiple devices, autoprobe and hotplugging.
1385 Note: you need to load the firmware via usx2yloader utility included
1386 in alsa-tools and alsa-firmware packages.
1391 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
1392 8233A, 8233C, 8235, 8237 (south) bridge.
1394 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
1396 joystick - Enable joystick (default off) [VIA686A/686B only]
1397 ac97_clock - AC'97 codec clock base (default 48000Hz)
1398 dxs_support - support DXS channels,
1399 0 = auto (default), 1 = enable, 2 = disable,
1400 3 = 48k only, 4 = no VRA, 5 = enable any sample
1401 rate and different sample rates on different
1403 [VIA8233/C, 8235, 8237 only]
1404 ac97_quirk - AC'97 workaround for strange hardware
1405 See "AC97 Quirk Option" section below.
1407 This module supports one chip and autoprobe.
1409 Note: on some SMP motherboards like MSI 694D the interrupts might
1410 not be generated properly. In such a case, please try to
1411 set the SMP (or MPS) version on BIOS to 1.1 instead of
1412 default value 1.4. Then the interrupt number will be
1413 assigned under 15. You might also upgrade your BIOS.
1415 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
1416 channels as the first PCM. On these channels, up to 4
1417 streams can be played at the same time, and the controller
1418 can perform sample rate conversion with separate rates for
1420 As default (dxs_support = 0), 48k fixed rate is chosen
1421 except for the known devices since the output is often
1422 noisy except for 48k on some mother boards due to the
1424 Please try once dxs_support=5 and if it works on other
1425 sample rates (e.g. 44.1kHz of mp3 playback), please let us
1426 know the PCI subsystem vendor/device id's (output of
1428 If dxs_support=5 does not work, try dxs_support=4; if it
1429 doesn't work too, try dxs_support=1. (dxs_support=1 is
1430 usually for old motherboards. The correct implemented
1431 board should work with 4 or 5.) If it still doesn't
1432 work and the default setting is ok, dxs_support=3 is the
1433 right choice. If the default setting doesn't work at all,
1434 try dxs_support=2 to disable the DXS channels.
1435 In any cases, please let us know the result and the
1436 subsystem vendor/device ids. See "Links and Addresses"
1439 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
1440 additionally. The mpu_port option is for VIA686 chips only.
1442 The power-management is supported.
1444 Module snd-via82xx-modem
1445 ------------------------
1447 Module for VIA82xx AC97 modem
1449 ac97_clock - AC'97 codec clock base (default 48000Hz)
1451 This module supports one card and autoprobe.
1453 Note: The default index value of this module is -2, i.e. the first
1456 The power-management is supported.
1461 Module for virtual rawmidi devices.
1462 This module creates virtual rawmidi devices which communicate
1463 to the corresponding ALSA sequencer ports.
1465 midi_devs - MIDI devices # (1-4, default=4)
1467 This module supports multiple cards.
1472 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
1474 mic - Enable Microphone on V222 Mic (NYI)
1475 ibl - Capture IBL size. (default = 0, minimum size)
1477 This module supports multiple cards.
1479 When the driver is compiled as a module and the hotplug firmware
1480 is supported, the firmware data is loaded via hotplug automatically.
1481 Install the necessary firmware files in alsa-firmware package.
1482 When no hotplug fw loader is available, you need to load the
1483 firmware via vxloader utility in alsa-tools package. To invoke
1484 vxloader automatically, add the following to /etc/modprobe.conf
1486 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
1488 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
1489 /etc/modules.conf, instead.)
1490 IBL size defines the interrupts period for PCM. The smaller size
1491 gives smaller latency but leads to more CPU consumption, too.
1492 The size is usually aligned to 126. As default (=0), the smallest
1493 size is chosen. The possible IBL values can be found in
1494 /proc/asound/cardX/vx-status proc file.
1496 The power-management is supported.
1501 Module for Digigram VX-Pocket VX2 and 440 PCMCIA cards.
1503 ibl - Capture IBL size. (default = 0, minimum size)
1505 This module supports multiple cards. The module is compiled only when
1506 PCMCIA is supported on kernel.
1508 With the older 2.6.x kernel, to activate the driver via the card
1509 manager, you'll need to set up /etc/pcmcia/vxpocket.conf. See the
1510 sound/pcmcia/vx/vxpocket.c. 2.6.13 or later kernel requires no
1511 longer require a config file.
1513 When the driver is compiled as a module and the hotplug firmware
1514 is supported, the firmware data is loaded via hotplug automatically.
1515 Install the necessary firmware files in alsa-firmware package.
1516 When no hotplug fw loader is available, you need to load the
1517 firmware via vxloader utility in alsa-tools package.
1519 About capture IBL, see the description of snd-vx222 module.
1521 Note: the driver is build only when CONFIG_ISA is set.
1523 Note2: snd-vxp440 driver is merged to snd-vxpocket driver since
1526 The power-management is supported.
1531 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
1533 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
1534 1 (auto-detect for YMF744/754 only)
1535 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
1536 1 (auto-detect for YMF744/754 only)
1537 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
1539 rear_switch - enable shared rear/line-in switch (bool)
1541 This module supports autoprobe and multiple chips.
1543 The power-management is supported.
1545 Module snd-pdaudiocf
1546 --------------------
1548 Module for Sound Core PDAudioCF sound card.
1550 Note: the driver is build only when CONFIG_ISA is set.
1552 The power-management is supported.
1558 The ac97_quirk option is used to enable/override the workaround for
1559 specific devices on drivers for on-board AC'97 controllers like
1560 snd-intel8x0. Some hardware have swapped output pins between Master
1561 and Headphone, or Surround (thanks to confusion of AC'97
1562 specifications from version to version :-)
1564 The driver provides the auto-detection of known problematic devices,
1565 but some might be unknown or wrongly detected. In such a case, pass
1566 the proper value with this option.
1568 The following strings are accepted:
1569 - default Don't override the default setting
1570 - none Disable the quirk
1571 - hp_only Bind Master and Headphone controls as a single control
1572 - swap_hp Swap headphone and master controls
1573 - swap_surround Swap master and surround controls
1574 - ad_sharing For AD1985, turn on OMS bit and use headphone
1575 - alc_jack For ALC65x, turn on the jack sense mode
1576 - inv_eapd Inverted EAPD implementation
1577 - mute_led Bind EAPD bit for turning on/off mute LED
1579 For backward compatibility, the corresponding integer value -1, 0,
1580 ... are accepted, too.
1582 For example, if "Master" volume control has no effect on your device
1583 but only "Headphone" does, pass ac97_quirk=hp_only module option.
1586 Configuring Non-ISAPNP Cards
1587 ============================
1589 When the kernel is configured with ISA-PnP support, the modules
1590 supporting the isapnp cards will have module options "isapnp".
1591 If this option is set, *only* the ISA-PnP devices will be probed.
1592 For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
1593 together with the proper i/o and irq configuration.
1595 When the kernel is configured without ISA-PnP support, isapnp option
1596 will be not built in.
1599 Module Autoloading Support
1600 ==========================
1602 The ALSA drivers can be loaded automatically on demand by defining
1603 module aliases. The string 'snd-card-%1' is requested for ALSA native
1604 devices where %i is sound card number from zero to seven.
1606 To auto-load an ALSA driver for OSS services, define the string
1607 'sound-slot-%i' where %i means the slot number for OSS, which
1608 corresponds to the card index of ALSA. Usually, define this
1609 as the same card module.
1611 An example configuration for a single emu10k1 card is like below:
1612 ----- /etc/modprobe.conf
1613 alias snd-card-0 snd-emu10k1
1614 alias sound-slot-0 snd-emu10k1
1615 ----- /etc/modprobe.conf
1617 The available number of auto-loaded sound cards depends on the module
1618 option "cards_limit" of snd module. As default it's set to 1.
1619 To enable the auto-loading of multiple cards, specify the number of
1620 sound cards in that option.
1622 When multiple cards are available, it'd better to specify the index
1623 number for each card via module option, too, so that the order of
1624 cards is kept consistent.
1626 An example configuration for two sound cards is like below:
1628 ----- /etc/modprobe.conf
1630 options snd cards_limit=2
1631 alias snd-card-0 snd-interwave
1632 alias snd-card-1 snd-ens1371
1633 options snd-interwave index=0
1634 options snd-ens1371 index=1
1636 alias sound-slot-0 snd-interwave
1637 alias sound-slot-1 snd-ens1371
1638 ----- /etc/moprobe.conf
1640 In this example, the interwave card is always loaded as the first card
1641 (index 0) and ens1371 as the second (index 1).
1644 ALSA PCM devices to OSS devices mapping
1645 =======================================
1647 /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
1648 /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
1649 /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
1650 /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
1651 /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
1652 /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
1653 /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
1654 /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
1655 /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
1657 The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
1658 sound card number and second means device number. The ALSA devices
1659 have either 'c' or 'p' suffix indicating the direction, capture and
1660 playback, respectively.
1662 Please note that the device mapping above may be varied via the module
1663 options of snd-pcm-oss module.
1669 The ALSA driver fully supports the devfs extension.
1670 You should add lines below to your devfsd.conf file:
1672 LOOKUP snd MODLOAD ACTION snd
1673 REGISTER ^sound/.* PERMISSIONS root.audio 660
1674 REGISTER ^snd/.* PERMISSIONS root.audio 660
1676 Warning: These lines assume that you have the audio group in your system.
1677 Otherwise replace audio word with another group name (root for
1681 Proc interfaces (/proc/asound)
1682 ==============================
1684 /proc/asound/card#/pcm#[cp]/oss
1685 -------------------------------
1686 String "erase" - erase all additional informations about OSS applications
1687 String "<app_name> <fragments> <fragment_size> [<options>]"
1689 <app_name> - name of application with (higher priority) or without path
1690 <fragments> - number of fragments or zero if auto
1691 <fragment_size> - size of fragment in bytes or zero if auto
1692 <options> - optional parameters
1693 - disable the application tries to open a pcm device for
1694 this channel but does not want to use it.
1695 (Cause a bug or mmap needs)
1696 It's good for Quake etc...
1697 - direct don't use plugins
1698 - block force block mode (rvplayer)
1699 - non-block force non-block mode
1700 - whole-frag write only whole fragments (optimization affecting
1702 - no-silence do not fill silence ahead to avoid clicks
1703 - buggy-ptr Returns the whitespace blocks in GETOPTR ioctl
1704 instead of filled blocks
1706 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
1707 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
1708 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
1711 Early Buffer Allocation
1712 =======================
1714 Some drivers (e.g. hdsp) require the large contiguous buffers, and
1715 sometimes it's too late to find such spaces when the driver module is
1716 actually loaded due to memory fragmentation. You can pre-allocate the
1717 PCM buffers by loading snd-page-alloc module and write commands to its
1718 proc file in prior, for example, in the early boot stage like
1719 /etc/init.d/*.local scripts.
1721 Reading the proc file /proc/drivers/snd-page-alloc shows the current
1722 usage of page allocation. In writing, you can send the following
1723 commands to the snd-page-alloc driver:
1725 - add VENDOR DEVICE MASK SIZE BUFFERS
1727 VENDOR and DEVICE are PCI vendor and device IDs. They take
1728 integer numbers (0x prefix is needed for the hex).
1729 MASK is the PCI DMA mask. Pass 0 if not restricted.
1730 SIZE is the size of each buffer to allocate. You can pass
1731 k and m suffix for KB and MB. The max number is 16MB.
1732 BUFFERS is the number of buffers to allocate. It must be greater
1733 than 0. The max number is 4.
1737 This will erase the all pre-allocated buffers which are not in
1744 ALSA project homepage
1745 http://www.alsa-project.org
1747 ALSA Bug Tracking System
1748 https://bugtrack.alsa-project.org/bugs/
1751 mailto:alsa-devel@lists.sourceforge.net
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