Again, it's me.
Like many people before, I want my four analogue speakers to be a surround40 device *and*, whenever I play from a stereo (and not a surround source), they all four playing this sound.
I already had this question, and some member suggested to use the device "surround40"; but this device though enables this capativity, but plays the stereo source only on my front speakers. I played a bit around with the .asoundrc file, and had this solution in the end:
# Duplicate a stereo source to the rear speakers
# do a rate conversion since 44100 is played to fast
Now, this works, and quite nice, for example when playing mp3's with xmms. But!
I'm not sure whether this would "kill" any real surround sound, e.g. when watching a DVD. I cannot test, since I don't know how (the only thing I could do was looking for a surround sound file, but I found none). Could please anybody answer this, and, perhaps, provide a solution that would not overwrite any surround sound source (if my solution does this).
I'm a totally ALSA
and am thankful for every piece of help