[sdiy] Has anyone built a voice pitch tracker?

[Grant Richter]

There is a dynamic pitch correction algorithm built in to the new Kaoss pad
2, KP2. Playing with it, there is so much going on with formants, that just
correcting pitch is unconvincing, actually weird sounding.

> I tried it with voice too, of course. But it's very difficult to
> control the pitch of the own voice when you hear something with a
> pitch that relates to the voice's pitch but is at a different pitch.
> Ever tried to sing through a pitch shifter? It's definitely easier to
> control a synth with a conventional interface (like a keyboard) than
> with the voice.
> 
> AFAIK these "voice intonation correctors" (whatever they are called -
> think Cher effect) only work well when the singer does *not* hear the
> modified voice signal while singing.