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i use the moises ai to isolate vocals and only apply noise reduction in audacity, very basic thing, besides equalizing everything ok
i know that to isolate voice has that little trick of creating two tracks and taking the vocals (make for karaoke, but i don't think it takes)
i know you have a pirate site there to download stuff from flstudio, but i never used it
i don't produce anything, i just slap with voice