Yes yes double post.
So the program Audacity has a way to invert waves. I don't own the original Heisei Fuuzoku Instrumentals so... the waves have different amplitudes. Not to mention Mp3 artifacts & compression. Completely hopeless.
Next I'm going to try and find a Shiina Ringo song with perfectly centered vocals, subtract the vocals out by inverting one stereo channel... then subtracting THAT from an inverted mono mix of the same song...
No I don't have my hopes up.
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