Dave Smith Instruments PROPHET 12 DESKTOP - Manual (Page 28)

16 Oscillators Dave Smith Instruments
Frequency Modulation (FM): 0…127— Allows one oscillator—called the
modulator, for the purposes of FM synthesis—to modulate the frequency of
another oscillator—called the carrier. The arrows between the oscillator select
buttons show the modulator/carrier relationship between the oscillators, as does
the following table.
Carrier Modulator
Oscillator 1 Oscillator 2
Oscillator 2 Oscillator 3
Oscillator 3 Oscillator 4
Oscillator 4 Oscillator 1
Turning up FM for oscillator 1 causes it to be modulated by oscillator 2, turn-
ing up FM for oscillator 2 causes it to be modulated by oscillator 3, and so on.
Note: The indicated order of modulation is really just a handy shortcut. In
fact, you can route any oscillator to another using the modulation matrix. See
Modulation on page 32 for more information.
Amplitude Modulation (AM): 0…127— As with FM, AM uses the oscillators
as carrier/modulator pairs. But with AM, the modulator modulates the carrier’s
amplitude, not its frequency. As with FM, any oscillator routing combination can
be configured using the modulation matrix.
Glide Amount: 0...127 —Sets the oscillator glide (portamento) amount. Glide
can be set independently for each oscillator. Low values are shorter/faster. The
g
lide
switch must be on to hear the effect of g
lide
a
mount
. For a detailed expla-
nation, see Glide on page 36.
Tip: To set g
lide
a
mount
for all oscillators simultaneously, press and briefly
hold any of the oscillator select buttons until all of them are lit. Repeatedly
press P
rev
and n
ext
P
aram
(Soft keys 2 & 3) until g
lide
is displayed. Press
and hold, H
old
: e
dit
a
ll
(Soft key 1) while adjusting one of the soft knobs.
Press any oscillator button to exit.
Slop: 0…127— Adds random detuning to the oscillator to emulate the tuning
instability of voltage controlled analog oscillators, from subtle, barely perceptible
amounts to wildly out of tune.
Oscillator 1 Sub Octave: 0…127— Controls the level of a sine wave oscilla-
tor pitched one octave below oscillator 1.