To me, it seems like an overlap is when the audio is longer than how these programs calculate the video duration. When this happens I can hear parts of a song skip forward as if a fraction of a second is missing from it. There are a bunch of titles I've copied to my hard drive that get screwed up from this overlap removal because it will do it before it decodes the audio, so it can screw up things like .dtshd which eac3to itself is not one bit aware of, and needs a 3rd party codec to decode. If you are simply ripping a .dtshd track, it's not going to even bother looking at the audio data, it just does a demux, so it is NOT aware of redundant audio data. It introduces corruption of the audio. I can't be any more descriptive than that.
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