[alsa-devel] [PATCH - alsa-lib 1/1] add surround21 for Echo3G devices

[Raymond Yau]

>
> Compare these these two conf:
>
http://git.alsa-project.org/?p=alsa-lib.git;a=blob;f=src/conf/cards/SB-XFi.conf;h=eb2218bfdcc704e4bf39e0e0c21539ee7f9ff8f8;hb=HEAD
>
http://git.alsa-project.org/?p=alsa-lib.git;a=blob;f=src/conf/cards/CA0106.conf;h=2f0eaf0afdc8dc826cbd3722b61cdb3310ca07f0;hb=HEAD
>
> BOTH of them shows that the four "stereo" ports they have exist as
> "device", but the SB-XFi.conf does not use the multi plugin to bind
> them to provide a surround PCM like CA0106.conf; instead it can simply
> use the "front" PCM, apparently.

These two cards are different, emu10k1  have "rear" device,  "centerlfe"
and "side" devices

but they use multi plugin instead of surroundxx use pcm.front

SB-XFi.pcm.surround40.0 cards.SB-XFi.pcm.front.0
SB-XFi.pcm.surround51.0 cards.SB-XFi.pcm.front.0
SB-XFi.pcm.surround71.0 cards.SB-XFi.pcm.front.0