This document is for the SB Audigy2-LS soundcards

The AC97 main volume and PCM volume controls don't work because the
device provide separate volume controls for front/surround/center/lft/rear
channels. Use ossxmix for controlling these volumes.

Channel allocation:
-------------------
/dev/dsp0 is front playback and recording.
/dev/dsp1 is surround playback.
/dev/dsp2 is center/lfe.
/dev/dsp3 is aux (side) playback

There is one options.cfg setting. audigyls_spdif_enable=0 disables S/PDIF
and enables the analog center/lfe output (digital center/LFE output will
always work). audigyls_spdif_enable=1 (default) enables S/PDIF and
disables analog center/LFE.

Recording Source
----------------

Recording source is selectable from SPDIF (in/out), I2S and AC97.
Default should be AC97 because that's where the mic,cd,line inputs
come from.

Loopback Recording
------------------

You can set the record device /dev/dsp0 to record any particular
channel that is playing audio. This is what we call "record-what-you
hear" and is useful for recording RealAudio streams or DVD audio or
any other audio formats. You can record from /dev/dsp0, /dev/dsp1,
/dev/dsp2 or /dev/dsp3

CDROM Audio
-----------

The SB AudigyLS version doesn't have the CD audio cable connected
between the CDROM and the soundcard. For that reason you cannot use any
of the CD players that come with Gnome or KDE to listen to CDs. You will
need to use Xine or XMMS to play CDs digitally extracted on the fly.

To configure XMMS to play CDs digitally, you must press

in
the XMMS window, then highlight the CD Audio Player plugin in the
"Audio I/O Plugin tab" and press the "Configure" button. Now, under
the "Device" tab, check mark the "Digital Audio Extraction" option.
Set up the CDROM device and the directory where it will be mounted
and press the "OK" buttons to close both windows. In order to play CDs,
press the "Eject" button and under the Directory browser, change the
directory to the CDROM mount directory set in the CDROM config panel
described above. You should now see the tracks listed and finally,
select a track and press the "Play" button and you should now
be able to hear CD audio.

With Xine, no additional configuration is needed as it's automatically
set to play CDs digitally. Press the CD button on the main Xine window
and you should start hearing CDs play via the /dev/dsp device