[878654Tom]

Diff two copies and remove the diff.

[PythagoRascal]

I doubt they'd just add a UUID in a file header somewhere. If they uniquely modify the actual audio samples in a way that is inaudible during casual listening, that would be much harder to "diff", I think.

[878654Tom]

If it is inaudible then I can just remove the diff from both or overlap them or...