pitch shifting....the analog way???

[Smilen Dimitrov]

At 03:53 PM 9/12/98 +0200, you wrote:
>Hi list...
>just wondered if there was any way to pitch shift with analog stuff...
I don't really know much about pitch shifting, but couldn't it be done with
a simple sine oscillator multiplied with the original signal? Then you
should get 
½Um(j(w+w0))+½Um(j(w-w0)). But then you shall get the both bands, and if
you want the single band, then it's Hilbert time, and I have no idea how to
do this.. Though I think it would be nice if someone could tell me what the
basic idea is behind pitch shifters, and what the basic difference between
those, phasers and flangers are...
greets.
smilen