[sdiy] Polyphonic Vibrato

[phillip m gallo]

Harry,

Polyphonic Vibrato is a very good effect.  Yes, you can set it up to sound
"out of tune" if the vibrato depth and rates are considerably different for
each voice, however, you can create a very clean chorus that is not "fuzzy"
or indistinct as delay based chorusing can often be.  Also LFO is not the
only effective modulation source as "noise" provides a great source for
ensemble effects.

The effectiveness depends upon the architecture of the "poly". For instance,
if you have a single VCO per voice then the resulting chorusing is very
"stark" and capable of a very distinct ensemble sound. If you have a synth
with two VCO's per voice; if one voice has no or very little modulation
while it's companion VCO is modulated distincly the composite ensemble
effect is far more defined that delay based chorusing.


I have experimented with this quite a bit.  Presently, i am didling with the
firmware of the JX3P to implement separate LFO's for each of the twelve
oscillators and so it sound very cool.

regards,
p


-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of harry
Sent: Sunday, April 21, 2002 9:18 PM
To: synth-diy at dropmix.xs4all.nl
Subject: [sdiy] Polyphonic Vibrato


Opinions solicited....

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.

I might do polyphonic LFO depth from a single LFO (delayed vibrato
per voice)

opinions ? I KNOW everyone HAS one....  ;^P

H^) harry




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