how to select audio stream in movie?

I've downloaded Mezzmo trial and it looks like it covers all my needs with my new Sony Bravia KDL-46EX711.
The only thing which I cannot find so far is how to switch audio track in the movies with more than 1 audio. As far as I understand it picks the default audio track. Is there a way to select desired audio without recoding video file?

There is no way to do this from within Mezzmo at the moment, but this is a planned feature in the next major Mezzmo update.

You can use tsmuxer to drop out the unwanted channels. My BDP-S370 plays .m2ts files happily.