[MPlayer-users] Creating 6.1 sound from 5.1 source.

[Reimar Döffinger]

On 14.04.2013, at 00:19, Marc MERLIN <marc_mplayer at merlins.org> wrote:
> I use mplayer -ac hwdts,hwac3 for playing.

If you use those MPlayer can't change the audio in any way.
Either you use passthrough like this and be happy with whatever the receiver does, or disable passthrough and let MPlayer process the audio.