The MM-973 is a triple Low Frequency Oscillator (LFO) loosely based on the PPG 305 LFO. It features three independent oscillators, with multiple outputs for different waveforms, as well as a few extras!

LFOs 1,2

Simple LFOs with Frequency controls, and Square and Triangle outputs for each, along with a shared Reset Input for Sync.

LFO 3

A much more complex LFO; this features a frequency control, Reset input and multiple outputs for Square, Pulse, Triangle and Sine Waves, but with a few extra features.

The RANGE switch is used to go from LO (0.1Hz to 10Hz) and HI (10Hz - 100Hz).

PULSEWIDTH control controls the PULSE waves' duty cycle.

The OSCILLATION switch allows you to use LFO3 as either a normal LFO when on, or when switched off and a HIGH signal is sent to the RESET input the LFO will output a single cycle of the given waveform, before halting.