34
Poly Mod
Sequential
Poly Mod
Although the basic sonic character of the Prophet-5 is determined by its
oscillators and lters, much of its power to make truly unique sounds
comes from creative use of Poly Mod, or polyphonic modulation. Modu-
lation is the process of routing one parameter (used as a control voltage)
to another parameter in order to change the way the targeted parameter
behaves.
In the case of the Prophet-5 you can use Osc B or the Filter Envelope
Generator to modulate Oscillator A frequency, Oscillator A pulse width,
or Filter cutoff frequency. And because there are ve voices, this means
that each voice applies modulation to the selected destination.
For example, if you set Oscillator B to lo freq mode, this essentially
creates ve separate modulation LFOs since Osc B on each of the
Prophet-5’s ve voices then functions as a low frequency oscillator while
in lo freq mode. If keyboard tracking is set to half or full, each of those
oscillators/LFOs tracks the keyboard and has a different frequency. It’s a
simple but powerful concept.
The Poly Mod section
Poly Mod modulation sources:
• Filter Envelope
• Oscillator B frequency
Poly Mod modulation destinations:
• Oscillator A frequency
• Oscillator A pulse width (square wave)
• Filter cutoff frequency
To Next Page
Loading...
