Remove Ambient by Mygoshi at 4:23 PM EST on January 19, 2017
So, Bee Movie Game have some tracks from the Wii version that aren't on the other versions, but they have ambience mixed with music in one file. I'm wondering how to remove that ambience from the music perfectly. I found out that the Wii versio n have multiple tracks that have the same ambience in it, and these tracks are also availbe on the other versions but without the ambience. I wanted to know how to use the "non-ambienced-mixed" theme from the other version to only keep the ambience of the Wii version, to use it to remove from the specific track I want. It has something to do with Invert in Audacity and Mono tracks, but I don't seem to obtain a good result.
If simple inversion is not working, you can probably do this with the same software used to create acapellas from instrumentals+full mixes, using FFTs or other means of spectral filtering.
The kn0ck0ut or MashTactic VSTs are two that I have used in the past to accomplish a similar goal.
It works by analyzing the spectrum of the left and right channels and selecting the frequencies that are common, or removing the frequencies that are common, depending on the effect you want. It's different for any song/audio you try. There are also FFT-based ones, like the center extractor built into Audition, that also work on the phase information of the audio.