34 Poly Mod
Dave Smith Instruments
You can control how much the source affects the destination by dialing in
a specific modulation amount with the
filter
env
or
osc
2
knobs. Modu-
lation amount can either be positive or negative.
Use Poly Mod to create complex harmonic effects ranging from FM
(frequency modulation) to audio-rate filter modulation and beyond. Many
classic sounds on the original Prophet-5 were created through clever use
of Poly Mod.
Poly Mod Parameters
Filter Env:
Selects the amount of modulation from the Filter Envelope
that is applied to a selected destination. Modulation amount can be either
positive or negative.
Osc 2:
Selects the amount of modulation from Oscillator 2 that is applied
to a selected destination. Modulation amount can be either positive or
negative.
When using
osc
2
as a modulation source, the modulation character is
affected by the waveshape currently chosen for Oscillator 2 (triangle, sawtooth, or
square/pulse). Try setting Oscillator 2 to low frequency (using the
low
freq
switch) to
further increase modulation possibilities.
Freq 1:
Selects Oscillator 1 frequency as a modulation destination.
Choose
osc
2
as a modulation source to produce FM effects with their
characteristic complex harmonics and metallic timbre.
Shape 1:
Selects the Oscillator 1 waveshape as a modulation destination.
This can animate the timbre of Oscillator 1 in interesting ways.
PW 1:
When Oscillator 1 is set to pulse wave, choosing this as a destina-
tion modulates its pulse width. This will animate the timbre of Oscillator 1
in interesting ways.
LP Filter:
Selects the Low-Pass Filter cutoff frequency as a modulation
destination.
HP Filter:
Selects the High-Pass Filter cutoff frequency as a modulation destination.
