35
Trigon-6 Operation Manual
Low Frequency Oscillator
Use Poly Mod to create complex harmonic effects ranging from FM
(frequency modulation) to audio-rate lter modulation and beyond. Many
classic sounds on the original Prophet-5 were created through clever use
of Poly Mod.
Poly Mod Parameters
Freq 1: Selects Oscillator 1 frequency as a modulation destination.
Choose osc 3 as a modulation source to produce FM effects with their
characteristic complex harmonics and metallic timbre. Choose filter env
as a destination source to sweep Oscillator 1’s frequency.
Freq 2: Selects Oscillator 2 frequency as a modulation destination.
Choose osc 3 as a modulation source to produce FM effects with their
characteristic complex harmonics and metallic timbre.
Freq 3: Selects Oscillator 3 frequency as a modulation destination.
Choosing osc 3 as a recursive modulation source could produce chaotic
effects. Choose filter env as a modulation source to sweep Oscillator 3’s
frequency (in lo mode for a modulated modulator effect, for example).
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.
PW 2: When Oscillator 2 is set to pulse wave, choosing this as a destina-
tion modulates its pulse width. This will animate the timbre of Oscillator 2
in interesting ways.
Feedback: Choosing this as a destination allows you to modulats the
amount of lter feedback.
Filter: Selects the amount of modulation from the Filter Envelope that is
applied to a selected destination. Modulation amount can be either posi-
tive 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.
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