No, you can't do that by SSB.

SSB mod/demod shift the frequency spectrum by a fixed frequency, say 100 Hz.
Not proportional to the frequency, as the question was.
Proportional shifting, as is accomplished by playing a record at another speed
as with wit it was recorded, leaves the signal readible to the ear, the timbre
changes. Shifting a fixed frequency makes it unintelligable, as anyone knows
who tried to receive SSB signals.


Norman Gillaspie wrote:

> This can be done using a SSB modulator and demodulator.
>
> To get good bass response through a telephone line. (300 Hz cutoff)
> It is common practice to shift the frequency up a few hundred Hz
> pass the signal thru the telephone line and shift the frequency
> back down. These were called frequency expanders and other names.
>
> However you might be asking how to modify a persons voice to
> make it sound deeper.
>
> Norman Gillaspie
>
> > -----Original Message-----
> > From: pic microcontroller discussion list
> > [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Jim Dolson
> > Sent: Thursday, June 11, 1998 8:25 AM
> > To: PICLIST@MITVMA.MIT.EDU
> > Subject: Shifting Audio Freq Down 10%
> >
> >
> > As part of a PIC project (naturally), I am looking for a method
> > of shifting
> > audio frequencies (100 Hz - 3.1 KHz) down 10% or so.  Can anyone point me
> > in the proper direction?  My background is all digital but I'm able to
> > learn  ;-)
> >
> > Jim
> > jdolson@iserv.net
> >



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