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Phase/Pulse Audio Waveshaper Mixer

In isolation, the ProPulse output is not revolutionary: just a variable-width rectangular wave, with unusual pulse-width modulation that moves both the leading and trailing edges by the same amount in opposite direction. This causes, with the change in the cyclical spectrum spacing of the PWM, a vibrato effect, but one half as strong as the vibrato caused by similar PWM of the rectangular wave of a triangle-core oscillator (which is often too much.) Nice, unusual, but surely not earth-shattering…

Where ProPulse shines, is when its pulse output is EQed and added or subtracted from some other waveshape (e.g., from the same VCO): you get more complex motion of the harmonics and a variation in tone up and down the keyboard. This can thicken up the sound, make individual notes more interesting, and create unexpected static waveforms: we can call this superposition synthesis.

The ProPulse Waveshaper/Mixer came out of several years study and modeling of the ARP Pro-Soloist’s waveshapes.

The ARP Pro-soloist has never been replicated for modular systems – its circuits are just too strange and leftfield. But fricko ProPulse Waveshaper Mixer now captures and takes further the arcane but brilliant Pro-Soloist waveshaper: by carefully analysing the logic circuits, we found a way to create their pulse waves (and others!) using standard analog circuitry.

ProPulse also provides the multiple (saw, mix, pulse) outputs needed for the two-path processing that is the essense of the ProSoloist architecture.

Physical: 6HP wide, 70 mm deep. (MOTM power connector installable)

Power (Current): +12V: <20mA, -12V: <12mA, +5V NA.

Status: IN STOCK

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