I'm broadcasting a 5.1 audio source that needs to be played in 5.1. Encoding through FME is done via the Stereo Mix feature in Windows 7. However it doesn't seem to downmix 5.1 properly, choosing to leave out the center channel for example (and anything other than front left and front right).
Is there a way to make Stereo Mix downmix properly, or does anyone have another method to get a 5.1 mix to downmix to stereo to send out via FME?