48
Sequencer
Dave Smith Instruments
Using Slew
In modular analog synthesizers, a lag processor or slew limiter is used to
create a smooth transition between successive, discrete control voltage
levels. The rate of change is called the slew rate and one common appli-
cation is to create a glide (aka portamento) effect between notes.
Among the possible destinations for gated sequences, tracks 2 and 4
offer a sequencer-only parameter called Slew. Slew behaves a little
differently from the other modulation destinations, in that it is not really
a destination at all. Instead, it affects the sequence in front of it. That is,
if Slew is the chosen destination for sequence 2, it controls sequence 1,
and Slew in sequence 4 controls sequence 3.
In the gated sequencer, Slew sets the slew rate between the previous
step’s value and the current step’s value when the step is gated on.
For example, let’s say sequence 1 is routed to oscillator frequency and
sequence 2 to Slew. Increasing the Slew value for step 4 will cause the
oscillator frequency to glide from the step 3 value when step 4 is gated
on. The higher the Slew value, the slower the slew rate. And the slew
rate can be different for each step. But its not just for oscillator glide.
Slew can be applied to any of the destinations. For example, sequence 3
could be routed to filter cutoff with Slew in sequence 4 used to create a
less abrupt transition from one step to the next.
Depending upon the BPM and Clock Divide settings, the slew rate can actually
exceed the time the envelopes are gated on, causing a step in the affected sequence
to not reach its set value. For example, if Slew is applied to oscillator frequency, high
Slew values may cause a step to sound flat or sharp. If that’s not what you want,
simply reduce the Slew value.
Sequencer Parameters
Type:
Gated, Poly—
This switch toggles between the polyphonic
sequencer and the gated sequencer.
Play:
On, Off—
This switch starts and stops polyphonic sequencer playback.
Record:
On, Off—
This switch turns sequencer recording/editing on and
off on the polyphonic sequencer.
Summary of Contents for Prophet Rev2
Page 1: ...8 16 Voice Polyphonic Synthesizer...
Page 2: ......
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Page 21: ...11 Prophet Rev2 User s Guide Getting Started...
