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Post #792027

Author
junh1024
Parent topic
Audio Isolation Using Per-Sample (or near per sample) Mode Averaging
Link to post in topic
https://originaltrilogy.com/post/id/792027/action/topic#792027
Date created
4-Oct-2015, 10:20 PM

It seems that remixavier uses stretching and FFT (which i can do with a combination of tools, see below)

thanks obi-juan for suggesting Remixavier. There's also utagoerip which is FFT-only. I'll mention other FFT-only tools below.

You can Forget about all this "Audio Isolation Using Per-Sample (or near per sample) Mode Averaging" (unless you stretch the audio, and that by itself is successful). Any audio that is not in perfect sync will not polarity inverse cleanly, this is where FFT-based tools come in handy.

RE FFT & sources, Other language tracks are less useful unless they align 100% (or if they are surround and have mostly isolated music in some channels). You may need to combine FFT with polarity inversion to get BGM if you have stereo only.

If you really have only 2 languages  in stereo and they don't align (and you don't treat it because it's generally hard to fix), you will get poor results , because 2 sides are pulling the same vocal frequencies. See pic for an example when we want to keep the music only, but we only have 2 voiced sources.

If you want to break through and get stuff done (and know how to use an actual DAW instead of audacity), I will suggest tools like REAPER + Quikquak mashtactic or R-Mix (FFT based imager) to remove music/sfx.

I have completed a project where I mostly removed the music from a mono version of the Animax card captor sakura dub, and replaced it with my own fixed surround version of the BGM derived from the JP 5.1 track [using the tools i mentioned above. You can probably do this with kn0ckout VST (or other FFT) in audiacity but it would be at least 4x slower & more finicky].

I'm in the middle of a similar project replacing the mono bgm of the Streamline Kiki's Delivery svc dub with surround bgm. But I don't really have that much time nowdays.