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3U Controllers & Sequencers

This section contains controllers to generate control signals from MIDI devices such as keyboard controllers, simultaneous two axis control signals from manual joystick control or preset sequences of control voltage or gate signals. Clock signal generation or synchronization of external sequences are possible with several of these devices.

GMS-632 USB/MIDI/CV Interface

A Eurorack compatible USB MIDI to CV converter uses the Teensy 3.1 microcontroller as its USB port and controller. 

GMS-775EU Sequencer 8

The GMS-775EU Sequencer 8 can be operated as an eight step voltage sequencer with gate outputs. Internal and external clock and resets are available for starting and synchronizing sequences.

GMS-744EU Multichannel MIDI/CV Converter

The GMS-744EU Multichannel MIDI to CV converter contains eight complete converter channels, each channel capable of producing an analog output and a gate output.


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. 


A wide range of electronic parts, kits, tools and accessories is available on the Strange Hardware site. Fast order response, free shipping specials and prompt service will get you the parts you need for your building, restoration or repair projects. You will find high tech hardware sure to inspire the inventor in you. 


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.


256 N Main St.
Cottage Grove WI 53527

Phone: 608 886-6503

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