I've been doing something like this for a bit in Audition. Center channel extract > invert phase > save as wav > create multi-track project > add original > add

I've been doing something like this for a bit in Audition. Center channel extract > invert phase > save as wav > create multi-track project > add original > add modified > up the volume on the vocal extracted modified version until the vocals go away Or you can do the exact opposite and instead of center channel extracting the vocals you can remove the vocals and use this method to better isolate vocals. Although if things do fun stuff with stereo it might not be exact.