Filter - Sequential Prophet Rev 2 User Manual

—Turns Oscillator 1 hard sync on. Sync forces Oscillator 1
Sync: Off, On
(the slave) to restart its cycle every time Oscillator 2 (the master) starts
a cycle. This provides a way to create more complex, harmonically rich
shapes from simple waveforms—especially when the frequency of Oscil-
lator 1 is set to a different interval than Oscillator 2.
Oscillator 1
Oscillator 2
Oscillator 1
synced to
Oscillator 2
Oscillator hard sync
Try using the auxiliary envelope to sweep the pitch of Oscillator 1 when it is
synced to generate the classic, hard-edged sync sound.
Controls the level of a square wave oscillator
Sub Octave: 0...127—
pitched one octave below Oscillator 1. Adding a sub octave to sounds
such as bass is a great way to increase low-register presence.
—Enables the outputs of oscillators 1 and 2 to be mixed
Osc Mix: 0...127
in varying amounts. A setting of 0 is equivalent to 100% Oscillator 1
and 0% Oscillator 2. A setting of 127 is the opposite. A setting of 64 is a
50-50 mix of both oscillators.
0...127 – Sets the output level of the white noise generator.
Noise:
0...127 – Adds randomized detuning to the oscillators to
Osc Slop:
emulate the tuning instability of vintage analog oscillators. This tuning
instability is a big part of what made vintage instruments sound charac-
teristically warm and fat. The oscillators in the Prophet Rev2 are very
stable, and will not drift. Use
osc slop
much drift as you like.
22 Oscillators
parameter to dial in as little or as
Sequential

Filter

The Filter takes the basic, raw sound of the oscillators and noise genera-
tor and subtracts frequencies, changing the harmonic content and char-
acter of their sound. This change can be varied over time using the Filter
Envelope to produce more dynamic, animated timbres.
The Prophet Rev2's filter is a classic, resonant low-pass Curtis filter that is
switchable between 2-pole operation (12 dB per octave) and 4-pole operation
(24 dB per octave). The 4-pole filter can self-oscillate when
set to its maximum.
LOW-PASS FILTER
CUTOFF RESONANCE ENV AMOUNT
4 POLE DELAY ATTACK
The Prophet Rev2 Filter
—Sets the filter's cutoff frequency. Frequencies are
Cutoff: 0...164
reduced from the top down, cutting the high frequencies and passing the
low frequencies, hence the name "low-pass."
—Emphasizes a narrow band of frequencies around
Resonance: 0...127
the cutoff frequency. High levels of resonance can cause the filter to self-
oscillate in 4-pole mode and generate its own pitch.
High levels of resonance can sometimes cause the Prophet Rev2 outputs to
clip. Monitor your outputs carefully to ensure optimal, clean signal levels. If you experi-
ence signal clipping, try reducing the levels of the
—Sets the amount of modulation from the filter
Env Amount: -127...127
envelope to the filter's cutoff frequency. Any setting above zero means
that each time you strike a key, the filter envelope controls how the filter
opens and closes. Higher amounts more dramatically affect the cutoff
frequency. This control is bipolar. Positive settings produce standard
behavior. Negative settings invert the envelope.
Prophet Rev2 User's Guide
resonance
VELOCITY KEY AMOUNT AUDIO MOD
DECAY SUSTAIN RELEASE
parameter in the filter.
resonance
Filter
is
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