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SECTION 10
MODULATION
This section explains use of the modulation control module.
MODULATION BASICS
The timbral and processing power of the modules in the audio path dene the
basic sound of a synthesizer. But the synthesizer's expressiveness depends
entirely on its modulation resources. Modulation allows the performer to apply
a combination of physical or electrical techniques to animate the sound: that
is, turn it from a static, xed timbre into a responsive and dynamic musical
event.
The Prophet-VS has an extensive modulation system. On the front panel
is a graph which shows which modulation sources can be routed to which
destinations. In this manual, the various modulation sources have been
illustrated in the block diagrams and discussed in the "BASICS" paragraphs
that introduce each module. (For example, the diagram of the oscillator mixer
in Section 8 shows the possible mixer modulation sources.)
Physical sources of modulation include the keyboard (key position), velocity,
pressure, the wheels, and the joystick. In addition to the three envelope
generators, electrical sources of modulation include the two LFOs. These can
be used to sweep oscillator pitch, oscillator mixture, lter cuto, LFO rate or
depth, voice pan, and chorus rate or depth.
SOURCE SELECT and DESTINATION SELECT
In general, to set up modulation paths:
1. Press Source Select for desired source.
The LCD shows the current source selection in the top line, and the amount to
which it has been set.
10
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