I have seen several people with this problem, and even seen a few people
who claim they've gotten it working, but I have had absolutely no luck
getting all four channels (and maybe center/LFE?) to play
simultaneously. I'm using alsa 0.9.6 right now, as well as the
xmms-alsa plugin. The card is a Turtle Beach Santa Cruz.
I can play audio on any of the 3 output PCM devices (front, rear,
center_lfe), and the sound comes out exactly as it should, but only from
those two channels. I'm trying to find out how to mix all channels
together simultaneously.
A few details that may be useful:
$ uname -r
2.4.20-gentoo-r6
$ cat /proc/asound/version
Advanced Linux Sound Architecture Driver Version 0.9.6.
Compiled on Aug 18 2003 for kernel 2.4.20-gentoo-r6 with versioned
symbols.
$ cat /proc/asound/modules
0 snd-cs46xx
$ cat /proc/asound/cards
0 [CS46xx ]: CS46xx - Sound Fusion CS46xx
Sound Fusion CS46xx at 0xfe2fe000/0xfe100000, irq
11
$ cat /proc/asound/pcm
00-00: CS46xx : CS46xx : playback 31 : capture 1
00-01: CS46xx - Rear : CS46xx - Rear : playback 31
00-02: CS46xx - IEC958 : CS46xx - IEC958 : playback 1
00-03: CS46xx - Center LFE : CS46xx - Center LFE : playback 31
I've noticed the configuration files in /usr/share/alsa, which mention
"surround40" and "surround51"... How can I go about using those
configurations, or otherwise mixing the channels (or should I say
"devices") together.
The alsa-project wiki mentions that 4-channel output has ben verified
working for this card, so I know there's a way to do it, I just need to
find out how :(
Thanks a lot for any help.
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