Audacity Forum

Simply subtracting the MP3 from the WAV, even reconverting the MP3 to a WAV (freezing in the losses) and subtracting via Audacity doesn't seem to produce the "ghost" effect. I think the subtraction may have to be done at the level of the actual time series? (BTW I'm using Audacity 2.0.6 on Windows 7).

I heard a radio program today that talked about the sounds you hear if you subtract an MP3 file from the original WAV file that the MP3 was derived from. This was exactly what I was looking for.