Surround Sound [solved]

[zak]

Thanks nofsky but I already found out just now and it works :-)

For the record (at least Debian unstable):

In OpenAL configuration file /etc/openal/alsoft.conf or user-specific file ~/.alsoftrc

format = AL_FORMAT_51CHN32

(32-bit float 5.1 output)

For ALSA in section [alsa]:

device = surround51

And maybe further settings at will. There are a lot of options, e.g. for speaker positioning and so on.

Some more information maybe here: http://www.halfgaar.net/surround-sound-in-linux