Audacity Forum

I'm having some trouble getting phase cancellation to work. Maybe someone can help me? I'm trying to isolate the piano track of Sympathy for the Devil by phase cancelling the original track with a version that has no piano track in the mix (except for a small amount of bleed from the other tracks). ...

The only explanation that I can think of is that they are NOT IDENTICAL (though they may be extremely similar). For cancellation to occur the audio samples must be exactly the same value at exactly the same time but with reverse polarity. Steve, You have to use an application that aligns the signal...