Could Spectralayers Pro reduce or mute the sound of music that is stereo (different in left and right channels) without affecting the center panned foreground dialogue or sound effects? If so how? Here's the audio files I'm working on.
In this case I don't think you can. Stereo audio is like a two dimensional painting. SLP lets you edit audio similar to Photoshop, but just like a strong solid color in a picture, a loud sound will mask other sounds behind it. The elements of your mixed audio will always contain traces of the surrounding elements.