quadrature audio

[Martin Czech]

> At 02:12 PM 14/04/99 +0200, Martin Czech  wrote:
> >what could be usefull applications for a wideband audio quadrature
> >circuit?  Ie. a circuit that offers some delayed versions of the input
> >and where the outputs have (allmost) 90 DEG phase difference?
> >
> Isn't this required for frequency shifting?
> (that is, adding an arbitrary number of Hz to each component of the
> input signal, NOT generating a harmony)
> 

Yes, this is the SSB method by Weaver I mentioned in my mail.

m.c.