linux/Documentation/sound/oss
Lucas De Marchi 78286cdf05 Documentation: replace install commands with softdeps
Install commands should not be used to specify soft dependencies among
modules. When loading modules it's much better to have a softdep that
modprobe knows what's being done than having to fork/exec another
instance of modprobe to load the other module.

By using a softdep user has also an option to remove the dependencies
when removing the module (and if its refcount dropped to 0)

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-30 16:03:15 -07:00
..
ALS
AudioExcelDSP16 Documentation: replace install commands with softdeps 2012-03-30 16:03:15 -07:00
btaudio
CMI8330 Documentation: remove references to /etc/modprobe.conf 2012-03-30 16:03:15 -07:00
ESS
ESS1868
Introduction Documentation: remove references to /etc/modprobe.conf 2012-03-30 16:03:15 -07:00
MultiSound
mwave documentation: convert the Documentation directory to UTF-8 2007-05-09 08:58:19 +02:00
OPL3
Opti Documentation: remove references to /etc/modprobe.conf 2012-03-30 16:03:15 -07:00
oss-parameters.txt sound: move driver parameters to their own files 2010-06-08 16:40:35 +02:00
PAS16 Documentation: remove references to /etc/modprobe.conf 2012-03-30 16:03:15 -07:00
PSS
PSS-updates
README.modules Documentation: replace install commands with softdeps 2012-03-30 16:03:15 -07:00
README.OSS Fix common misspellings 2011-03-31 11:26:23 -03:00
README.ymfsb Documentation: fix minor typos/spelling 2011-04-04 17:51:47 -07:00
Soundblaster
SoundPro
Tropez+
ultrasound
VIBRA16
vwsnd
WaveArtist

Legacy audio driver for YMF7xx PCI cards.


FIRST OF ALL
============

  This code references YAMAHA's sample codes and data sheets.
  I respect and thank for all people they made open the information
  about YMF7xx cards.

  And this codes heavily based on Jeff Garzik <jgarzik@pobox.com>'s
  old VIA 82Cxxx driver (via82cxxx.c). I also respect him.


DISCLIMER
=========

 This driver is currently at early ALPHA stage. It may cause serious
 damage to your computer when used.
 PLEASE USE IT AT YOUR OWN RISK.


ABOUT THIS DRIVER
=================

  This code enables you to use your YMF724[A-F], YMF740[A-C], YMF744, YMF754
 cards. When enabled, your card acts as "SoundBlaster Pro" compatible card.
 It can only play 22.05kHz / 8bit / Stereo samples, control external MIDI
 port.
 If you want to use your card as recent "16-bit" card, you should use
 Alsa or OSS/Linux driver. Of course you can write native PCI driver for
 your cards :)


USAGE
=====

 # modprobe ymfsb (options)


OPTIONS FOR MODULE
==================

  io           : SB base address     (0x220, 0x240, 0x260, 0x280)
  synth_io     : OPL3 base address   (0x388, 0x398, 0x3a0, 0x3a8)
  dma          : DMA number          (0,1,3)
  master_volume: AC'97 PCM out Vol   (0-100)
  spdif_out    : SPDIF-out flag      (0:disable 1:enable)

 These options will change in future...


FREQUENCY
=========

  When playing sounds via this driver, you will hear its pitch is slightly
 lower than original sounds. Since this driver recognizes your card acts
 with 21.739kHz sample rates rather than 22.050kHz (I think it must be
 hardware restriction). So many players become tone deafness.
 To prevent this, you should express some options to your sound player
 that specify correct sample frequency. For example, to play your MP3 file
 correctly with mpg123, specify the frequency like following:

  %  mpg123 -r 21739 foo.mp3


SPDIF OUT
=========

  With installing modules with option 'spdif_out=1', you can enjoy your
 sounds from SPDIF-out of your card (if it had).
 Its Fs is fixed to 48kHz (It never means the sample frequency become 
 up to 48kHz. All sounds via SPDIF-out also 22kHz samples). So your
 digital-in capable components has to be able to handle 48kHz Fs.


COPYING
=======

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2, or (at your option)
 any later version.

 This program is distributed in the hope that it will be useful, but
 WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.


TODO
====
 * support for multiple cards
   (set the different SB_IO,MPU_IO,OPL_IO for each cards)

 * support for OPL (dmfm) : There will be no requirements... :-<


AUTHOR
======

 Daisuke Nagano <breeze.nagano@nifty.ne.jp>