User Manual

32 Modulation Dave Smith Instruments
Modulation
Although the overall sonic character of the Prophet Rev2 is deter-
mined by its analog oscillators and lters, much of its power to make
truly unique and unusual sounds comes from creative use of modula-
tion. Modulation is the process of routing one parameter (i.e. a control
voltage) to another in order to change the way the targeted parameter
behaves.
The concept is simple:
1. Choose a source.
2. Choose a destination.
3. Set an amount. The amount can either be positive or negative.
You already understand and apply the concept of modulation whenever
you use the lter envelope to control the lter’s cutoff frequency. In this
case, the modulation source is the lter envelope (or more precisely, any
of its controls, such as attack, decay, sustain, or release). The modulation
destination, is the lter’s cutoff frequency. The modulation amount is set
with the env amount knob.
There are twenty-two different modulation sources and fty-three differ-
ent destinations to choose from. (See page 70 for a complete list.)
There are 8 freely assignable modulation paths (mod slots 1-8) as well as
5 additional dedicated mod sources: Mod Wheel, Pressure (aftertouch),
Breath Controller, Velocity, and MIDI Footswitch. This gives you a large
number of sound-shaping options.
SOURCE
DESTINATION
MODULATION
SELECT
AMOUNT
The Modulation section