[paddington]

Originally Posted by tgunn2760

What if the original source had mono audio that was encoded to stereo was it was made into a DVD?

Is there a way to tell if the original audio was mono or stereo?

do you mean it was 'teased' into fake 'stereo' like TISDU or so you mean they simply doubled the mono track to 2 channels to make the DVD compliant?

If the latter - don't 'fold down', as that doubles the amplitude values - just extract the left channel.

The thing is, if you want it to go to CD, red book says it must have two channels - mono doesn't fly. So, you'd have to copy left to right again (which is what they did in the first place, so maybe leave it).