[Bug] Losing DD centre channel mid movie??

[eightsix]

Was watching a movie on the c200 a couple of days ago when mid way the centre channel cut out, dialogue suddenly vanished, other channels were working fine though.

This has happened twice recently - the first time I thought something was just messed up in the file, but now that its happened again so soon after I am not so sure. I've never had this problem before. Quick fix was to have my amp mix it down to stereo for the remainder of the flims.

Not really sure whether the problem is the files, the PCH, or my amp, and not really sure how to go about determining which is responsible.

I do know that sound could properly be mixed down by the amp - I'm thinking all channels must be coming through to the amp properly for it to be able to do this, but not exactly sure how it all works..

Also not sure whether this is restricted to DD