Separating two out-of-sync audio sources on same audio channel

Question

I am trying to fix a problem in which I had an audio source captured a couple frames out of sync into the same audio channel. This is sound from a video clip broadcast through OBS in which embedded audio and a separate audio input each recorded onto both the left and right channels, meaning I cannot find a way to separate them, nor have I found a good editing solution (dereverb and others do not address this issue). It's not quite an echo - the two audio sources are very distinct, so I was hopeful I could find a solution. Is there any way to fix this?

SteveG_AudioMasters_ · Answer

People have asked about this before, but I'm afraid that there's absolutely no way to do this, because what you are trying to remove is identical to what you want to keep. In order to separate any component out from audio it needs to have something unique about it, either spatially or in terms of frequency difference. Everything you have is essentially the same for both signals, and if they are stuck on the same track, then that, I'm afraid, is permanent.

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