Downmix (decoded) 5.1 FLAC on the fly?

[Bruce Willis]

I created with eac3to an mkv containing 24bit 5.1 FLAC. But I only have a stereo amplifier :D

For decoding, I'm using Madshi's madFlac (http://forum.doom9.org/showthread.php?t=130498) filter. In the thread the subject of downmixing is discussed. Madshi says that it should be done by a seperate filter, because the function is not FLAC-specific (downmixing should also be possible for e.g. AC3), which makes sense.

So my question is: does such a filter exist?

If not, does a 24bit FLAC decoder+downmix filter exist?

[nautilus7]

Use ffdshow. Set "uncompressed" to "all supported" in the codecs tab and enable the mixer to 2.0.

[Bruce Willis]

I already solved it. I installed an 'AC3'-filter, which also accepts the pcm output of madFlac as input.

Thanks anyway nautilus for your reply.