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Audio DiffMaker and audio players

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I have been comparing the output of two different music players using ALAC files. I use DiffMaker to compare the two results. I then play the resulting difference file. I find if I turn up the gain on my amplifier enough I can hear the music that I used in the comparison. What does this mean? Shouldn't there be a null result, or a different result if the two files do not compare? I am thinking that this may be due to software type of jitter. But when I have the DiffMaker adjust for these timing and volume discrepancies, I still get the same result. I do align the two audio files very carefully in Audacity.


What gives here?


Thank you!


Bob Graham


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