WSY104MU FM/PM Operator

Thru Zero Frequency and Phase Modulated Oscillator

The WSY-104MU FM PM Operator module is a through-zero digital oscillator that has FM and PM modulation capability. The default output waveform is a sine wave although there is a provision for sampling an external waveform and then applying FM or PM modulation. The oscillator also has a feedback control and CV imput for controlling the amount of the oscillator output that will be fed back to the modulation input. The effect of this is to add additional harmonics to the output waveform. A synch input and output are provided to allow the oscillator to be synchronized with an external oscillator input and to a provide synchronization signal to other oscillators.


Technical Specifications

Mixer Section


Channel Gain Control
100K Linear Taper
-A Version 100K Audio Taper

Output Gain Control Range
-200% to +200%

Output Offset Range
-5 V to +5 V

Processor Section

Output Gain Control Range
-200% to +200%

Output Offset Range
-5 V to +5 V

Typical Input Impedance
100K Ohms

Typical Output Impedance
1K Ohms (short circuit protection)

Module Power
+15 Volts 25 mA.
-15 Volts 25 mA.

Module Size
Panel height - 8.75 inches (222 mm)
Panel width - 4.25 inches (108 mm)
Depth (behind panel) 2.1 inches (53 mm)



We produce electronic synthesizer modules in the two most popular formats, MU (Moog compatible 5U) and EU (Eurorack compatible 3U). A wide range of voltage controlled modules including oscillators, amplifiers, mixers, envelope generators, special effects units, wave generators, filters, power systems and cases allow users complete freedom to configure any desired electronic music instrument.


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Grove Audio has been manufacturing professional recording and modularized electronics for musicians and performers since 1995.