Miniwave Highpass modulation

August 11, 2013 · Posted in Uncategorized 

An implementation of the Bob Borries modulation trick to mimic PWM on a Miniwave.

Simply put, an LFO (or EG, or other modulation source) sweeps the cutoff on a ramp (rising sawtooth) wave being fed into a highpass filter. The output of the highpass HPF drives the Miniwave input.

Changing the waveshape of the ramp changes the spectral content of the Miniwave, lending a PWM style tonal sweep.

Not everything sounds great, but they beauty of it is that one can go from subtle sweeps to nails-on-a-chalkboard grind with relatively little effort.

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