[tgunn2760]

Originally Posted by jameskg

yes. Take the LPCM audio file you suspect is dual-mono (exact same left and right channels) and open in Cool Edit Pro 2.0 (or Adobe Audition - whichever you have).

Highlight the whole thing and open the "channel mixer". Invert ONE of the channels and play. If the audio is exactly the same left-right, it will be completly silent since you are subtracting the inverse from one side to the other. Get audio, and you do not have a true dual-mono source.


Now, if that is the case and you have isloated a mono source, the only remaining question is whether you can include an LPCM mono track on a DVD and still be compliant with the standard. I know with a CD, that would NOT be compliant - you have to double to 2 channels - back where you started.

Maybe a video mod can chime in about whether a DVD can contain a 1 channel mono LPCM stream - or you can visit www.videohelp.com and look up the DVD-Video standards. I'll try to have a look later if I have a chance.

I don't have either of the programs you suggested, and I don't have the lossless LPCM now so I will worry about it when I get it..IF, I get it?

As for the mono audio being compliant on a DVD, it is. I made one. I overwrote the AC3 audio in Tsunami DVD author Pro with the decompressed AC3. In fact, when I run the DVD files through GSpot it doesn't recognize the LPCM audio, it reads it as AC3.
And I know it is NOT AC3, I burned a copy of the original DVD with the AC3 audio, and played them both, the difference is impossible to miss.

Thanks again for your help.