[sdiy] Polyphonic Vibrato

[Dave Krooshof]

>Harry,
>>>  How useful is it to have polyphonic vibrato (i.e. one LFO per
>>  voice) in a polysynth.  This polysynth will play cloce voiced
>>  chords, as a rule....
>>  I wonder if having many LFOs would actually make the sound
>>  out-of-tune as they phase in and out.

It depends ultra.
If it's a one-man-one-instrument thing, I'd opt for the
guitar vibrato handle analogy.
(weather that should be called tremelo stick is an issue for another list).

Should it represent a choir, I'd opt for several LFO's, same
freqs, but a low pitched noise over each modulation rate.
That way, each voice will become it's own unit in
your perception.

Knowing you're doing hex guitar resynthesis, and guessing
where you're heading, I assume you'll build six LFO with
ajustable unsteadyness and one master control and
create the guitar played by a choir. (whooo imagine all their
hands on it!)

>I know! How about a rotating speaker?
That was invented an age ago (realy) when people used
tone wheel organs. These had the nasty feature that
all overtone stayed in phase canstantly, as all tone wheels
rotated on one axes with one motor. By moving your head
like Stevie, you could phaseshift the overtones, but that's
not christian (no offence intended), so they made a speaker
doing it for us.

Moral: A leslie speaker suggests rolling overtones.
Vibratowise it's one thing.

groets,

Dave,
leslie fanatic


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