Oscillators & Wave Generators

5U Synthesizer Modules

This section contains modules for generating waveforms such as sine, triangle, or square waves or for reproducing more complex waveforms from memory table or from storage media. Modules that accept control voltage input for pitch control are based on a 1 Volt per octave standard. 

GMS-782 Dual LFO/VCA

The GMS-782 Dual Voltage Controlled Low Frequency Oscillator/VC Amplifier provides low frequency triangle, sine or square waves for use as modifiers or triggers for complex evolving synth patches.

GMS-301 VC Oscillator

The GMS-301 Voltage Controlled Oscillator uses a precision, temperature compensated triangle core oscillator with 1V/Octave, linear FM, and exponential FM control inputs.

GMS-302 Dual VCO

Two full function analog voltage controlled oscillators combined in one 2MU wide panel along with essential support functions provide stable wide range waveforms including sine, triangle, pulse, saw and square waves.

GMS-1340 Polywav™ Player

The GMS-1340 Polywav™ Player is a multitrack polyphonic wav file player that permits stereo wav file playback at 44.1 KHz sample rate and 16 bits resolution. Up to 14 stereo wav files can play simultaneously. 

GMS-784 Quad LFO/VCA

The GMS-784 Quad Voltage Controlled Low Frequency Oscillator/VC Amplifier provides four low frequency triangle, sine or square waves in 2MU.

GMS782b Dual LFO/VCA

The GMS-782B Dual Voltage Controlled Low Frequency Oscillator/VC Amplifier provides two low frequency triangle, sine or square waves in 1MU.

GMS-1350MU Polywav™ MINI

The GMS-1350 Polywavâ„¢ MINI plays up to four 16 bit stereo WAV files simultaneously

WSY-104MU FM/PM Operator

The WSY-104MU FM PM Operator module is a through-zero digital oscillator that has FM and PM modulation capability.


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.


Grove Audio builds microphones, preamplifiers, equalizers, compressors and other professional audio equipment for performance and studio use. We build units in popular formats such as 19 inch rack mount and 500 series 3U modules. We can also produce custom designs on request. Contact us for a consultation.


You can explore all of our products, download spec sheets, and purchase our products in the Grove Audio Synth Store. You can also learn about our periodic specials and new product introductions. Click the button below to go directly to the store.

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  • Email: sales@groveaudio.com
  • Phone: 608 886-6503


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