I have hundreds of pairs of instrumental/vocal MP3 files. The instrumental versi

Question

I have hundreds of pairs of instrumental/vocal MP3 files. The instrumental version has music played with instruments. The vocal version does too, but it also has a vocal track overlaid.

I don't know what all processing went into creating these MP3 files, but I do know that the instrumental and vocal versions often do not have the same length, and they often start with a different length of silence.

I need to figure out what the offset is between each pair of MP3 files. Because there are so many of them, I would prefer a command line or batch solution.

I don't know anything about signal processing, I'm hoping for some existing tool that can easily do this. Any ideas?

Explanation / Answer

This other post recommends SOX which looks like it deserves looking into.

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