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Pulse Width Modulation

Both of the SJ-2’s oscillators have the option of selecting a pulse wave, which looks like this:

The pulse waves have a feature which none of the other waveforms 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.

9 Programming -PWM

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Manx Destubt V2 Guia do Utilizador Página 10