Change the Gender Of Singer's Voice!?

[QWERTY]

I have heard that for Film industry, for morphing purposes, they took
few hundreds photos of man, of different breeds (sorry if my English is
bad:) ) and pointed out some areas on face, like position of eyes,
position of top of the chin, position of top of the chin and so on.
After that measurement, they calculated average positions of all of
that spots and they draw the face of the "Average Male".

After that, they measured few hundreds of woman, and build the face of
the "Average Woman".

And, after all, they made matrix of coefficients, and when you multiply
picture of that "Average Man" with the matrix, output picture is
picture of the "Average Woman".

So, it is possible, when multiply picture of any man with matrix, to
get the picture of woman that is, let say so, analogous or compatible
with him.

All that story is intro in what I'm wondering to know:

Does anyone know the simple algorithm to change formants of man's
voice in order to build analogous woman's voice. (or childrens voice),
and vice versa ??

Thanks!

[RosH]

Hi friend,
It would be very nice if we had a perfect algorithm to change gender
of voices. As you have mentioned it, the correct way to find it out
would be the same method as used in the case of pictures. Study the
characteristics of a few hundred male voices and try to formulate a
relationship between the two genders. May take too much time and money
to do that kind of a research.
But you can do the same with less perfection using audio editing
softwares. You would be able to change the pitch of any sound to a
higher or lower pitch without changing the duration of sound. Cant say
whether there is any software that can do the same in real time, but
most of the editing programs available can do it in a process. Try
using one of the audio editing tools and you'll know that changing the
pitch to a higher one would replicate womans voice (not perfectly).

[not...@aol.com]

www.pgmusic.com has a sequencer that comes with a harmonizer tool that
can do this.
You can select how many voices harmonize, and how male or female they
sound.

You can record just one wave track, use the tool on the track to
process the wave into another voice.

Think these programs do more than just shift the pitch, maybe add some
resonate filters with appropriate settings.