Voltage Phase Module phase modulate one audio stream with another
. This means the amplitude of one signal changes the other audio signal's speed. VPM has 4 inputs. VPM can modulate channel 1 with channel 2 "mono mode", in stereo mode, channels 3 and 4 modulate channels 1 and 2 respectively, and 4 channels of incoming audio are processed. There is a third algorithm that sums channels 1 and 2, as well as 3 and 4, to mono, reduces the input values by half, and allows for modulating them in 'mono mode.' There is an additional switch that Inverts (flips) the inputs.
- Bandwidth knob controls the range of the delay algorithm. This knob is not designed for automation because it is noisy.
- PM Amount knob allows for musical phase modulation fade-ins and fadeouts, and timbre changes, and is more suitable for automation.