Silent Audio Channels in Compressed Output Files ...

Has anyone experienced dead silent audio channels in exported MP3 or Podcast/AAC files?
This is included in the application release notes:
Exporting to Compressed Formats
" If you export to compressed formats (MP3 or AAC) using devices that do not use class-compliant Core Audio drivers built into Mac OS X on Intel-based Macintosh computers, the audio track of the exported file may be silent. To avoid this issue, use the Audio MIDI Setup utility to change your default output audio device to Built-in or to a device that uses the class-compliant Core Audio drivers before exporting files."
I'm on a Dual PPC G5, and my Motu interface is compliant. All exported compressed files [with or without video in AAC exports] have silent audio channels.
Any news on this?
-ptfigg.
Power Mac G5 Dual 2.0 gHz
Power Mac G5 Dual 2.0 gHz

All the pods are set to master. I've never set any sub-mix tracks in the
past, and, yes, these are set to zero (but I didn't do it). I set the submix
to 3 for each Stereo & Mono in project settings, default sequence.
Made no difference.
Original audio is standard from a Sony professional camera. Same
camera I've used on a number of occasions.
What baffles me is that I just don't understand the error message
language. In other words: what is it saying?
Cheers,
Bill in Toronto
Date sent:     Thu, 20 May 2010 10:37:47 -0600
From:     Bill Hunt <[email protected]>
Send reply to:     [email protected]
To:     William McQueen <[email protected]>
Subject:      CS3 Error Message The number of audio channels in
     the output need....
OK, the Master is Stereo, and you have 3 Mono Tracks, that should
mix-down to that Stereo Master, which will not be a problem.
Now, it appears that you have no Sub-mix Tracks. Is that correct?
Check to see what the Track Mapping is set to for each of those Mono
Tracks. They should be set to Master.
Having the Track Mapping set improperly could possibly result in this
type of issue, as DVD's can only have a limited number of Audio
streams and these are well-defined.
Maybe someone else will have more ideas for you.
Good luck,
Hunt
PS - as a note, one cannot use ADL to Encore, if the Master is DD 5.1
SS, as that must go through the Minnetonka Audio SurCode DD 5.1 SS
encoder plug-in to get a DD 5.1 SS AC3. That does not seem to be
your case though.

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