On Tue, 22 May 2018, at 14:09, Sound of L.A. Music and Audio wrote:
> With the voice it is even more tricky, since the formant shaping is 
> different for other frequencies. One reason is, that there are more than 
> one "equalizer" involved. Just putting the whole track to a hight frequ 
> will disreagard this.

Yes, with this sort of thing it's important to remember that what you're trying 
to do is not really possible.

Ultimately you're asking to produce the sound that would have resulted from the 
same performers playing the same thing faster, slower, or in a different key. 
There's nothing like enough information in the audio to do that. If a 
convenient fudge like the phase vocoder happens to work usefully in some cases, 

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