[MPlayer-dev-eng] Audio question: stereo sound to 6 channel sound plugin

[Kis Gergely]

Hello,
I would like to ask, whether it would be possible to extend the surround
plugin to generate 6 channel sound instead of 4 channel. I have an SBLive
5.1 with six speakers, and would like to use the center/subwoofer even if
the audio stream is only stereo. I think it could be done this way:

-mix the stereo sound together to get mono sound.
-use a lowpass filter on the mono sound, and send it to the subwoofer.
-use a highpass filter on the mono sound, and send it to the center.
-the other 4 speakers would get the original stereo (or surround) data, as
it works now.

This is not an official feature request, I only would like to know if my
idea is feasible.

Thanks for your time,
Gergely