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Pulse Width Modulation

Both of the Bit-100 v2’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 a

‘low frequency oscillator’, and this produces a rich timbre.

( As mentioned earlier, PWM will only affect the sound of the Bit 100 if pulse waves are turned on. )

The source of the modulation is the Bit 100’s LFO 2 (discussed later).

The frequency control for LFO 2will effect PWM dramatically, as will

LFO 2 wave-shape ( but not the ‘delay’ function).

9 Programming -PWM

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Manx Destubt V2 Guía de usuario Pagina 10