Pulse Width Modulation
Both of the Destiny v2’s oscillators output pulse waves, which looks like this:
The pulse waves have a feature which the sawtooth waveforms don’t have; The peak to trough
ratio can be adjusted. We do this using a parameter known as ‘pulse width’.
Pulse Width
Pulse Width increased
This is a superb feature for two reasons:
Firstly, one wave shape - pulse - becomes an infinite number of wave shapes; all pulse waves with
different pulse widths.
The second reason is even more useful;
Because pulse width is a continuous variable, we can modulate it (vary it) in real time, using either
LFOs, envelopes (see later sections), or key tracking.
8 Programming -PWM
The controls labelled ‘WIDTH’ set the pulse width for
each oscillator. (1)
If the oscillator’s saw wave is patched in for audio output, the
pulse wave can’t be heard and so the settings here will have
no effect.
The actual Pulse width can be made to
fluctuate
around the
point set by the ‘WIDTH’ slider, by an amount
set by the ‘MOD’ slider - this stands for ‘Modulation’.(2)
The modulation source is selected using the switch below(3),
either LFO Sine wave or Envelope two (envelopes are described
later.)
1
4
2
3
1
