what's all this ssb stuff? Frequency shifter, that's what.

[Hallgeir Helland]

Hi MC and all,

I recently completed a copy (or should that be "clone"?) of Juergen Haible's
FS-1 Frequency Shifter, and I must say that there are many beautiful sounds
in it. And many interesting ones. And many, Many downright funny noises!
The most beautiful is probably with near zero Hertz on the carrier. This
produces a very nice phasing kinda sound when mixed with the dry signal.
And since both up- and down shifted signals are available on seperate outputs,
a fantastic stereo phasing sound can be obtained. Due to the varying phase
difference (I think), the phasing sound seems to rotate around (and sometimes
inside!) your head. Increasing the carrier frequency to a few Hertz will give
you more of a Leslie kinda sound - very useable and nice! 
Interesting sounds can be for example shifting an acoustic guitar track down
to around zero, so that some notes come up on "this side" of zero hertz while
others come up on "the other side".... hard to desctibe the sound, but very 
interesting as you slowly lower the carrier frequency and the sound "morphs"
back to clean guitar.... 
Funny ones can be: playing any pop song thru it at zero shift, then gradually
shifting it upwards - it soon becomes VERY out-of-tune and ugly! Or shift it 
down and through, so that the bass comes on top. :-) :-) :-) :-) :-) :-) etc.

Anyway, I just wanted to share that. Hope I didn't put my foot in it (meaning 
that maybe Martin is talking about something completly different...)

Hallgeir


"The important point is that the electron-photon interaction of special relativity is 
separated into a faster-than-light instantaneous longitudinal polarized non-radiative 
near-field and a transverse radiative far-field in every frame of reference".

                                                - Richard P. Feynman

Martin Czech wrote:
> 
> 
> The audio effect of ssb in contrast to "ringmodulation" is that
> the missing sideband is not heard , when your signal moved uo, you don't
> hear the mirror sideband move down to zero... and up again.
> 
> For low modulation frequency (1 Hz) you get phasing when mixed with original signal.
> Yoiu get beating there with "ringmodulation".
> 
> Finally ssb can fm any signal...
> m.c.

-- 
HELLAND MUSIKK TEKNOLOGI
-=  Hallgeir Helland  =-
hhelland at mailandnews.com