Music Thing Modular Eurorack Synth Modules
Open source electronic musical instruments designed in London.
Eurorack modules

Turing Machine is a random looping sequencer made from logic chips. It's a popular DIY project with a wide range of expanders. It spits out basslines and melodies.

Radio Music is a sampler pretending to be a radio. Inspired by radio-powered compositions by John Cage or Stockhausen, it plays audio files from a micro SD card

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Chord Organ is the easiest way to get simple chords* from a modular synth. Sequence chord shapes and root notes, edit voicings on the SD card. *also, weird jazzy chords.

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Graphic EQ is a compact, clean seven band Eurorack graphic equaliser inspired by the classic Boss GE-7 pedal.

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Spring is a spring reverb optimised for modular use. Use a real spring tank or a solid-state reverb brick. The feedback control adds anything from a subtle glow to screaming howlround.

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Simple EQ is a bit like a Seventies stereo. Two channels; one with bass & treble controls, one with tilt. Clean gain, but easy to push into distortion. The perfect first SMD soldering project.

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Mikrophonie is a contact mic pre-amp with the microphone stuck to the front panel. An easy way to bring environmental noise and feedback into a modular system. It's a very easy build, the perfect first DIY project.

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Magnetophon is a cassette player without the transport mechanism — a mono cassette head in the panel and a NAB equalised amplifier circuit, this is a tool for experiments with tape.

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Eurorack module expanders
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Spring Expander adds a blend control to mix solid-state and analog reverb, plus front panel connections for spring reverb tanks in small cases.

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Volts Expander is an extra voltage output for the Turing Machine, controlled by five pots. Multiple Volts can be daisy-chained for even more complex polyphonic sequences.

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Pulses Expander adds eleven rhythmic outputs to the Turing Machine. The looping pulse sequences related to the master clock are great for wonky drum patterns.

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Vactrol Mix Expander is a unique matrix mixer controlled by the Turing Machine. It’s a great way to create stereo effects, complex waveforms or feedback loops.

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Voltages Expander is the bigger brother of Volts, adding two CV outs to a Turing Machine.

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Other instruments

Axo Control is an easy passive control panel for the Axoloti sound board. Inspired by the Nord Micro Modular, it adds 6 knobs, 3 buttons, 4 LEDs and a joystick.

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PCB set from Thonk
Fictional modules