Moog Grandmother Semi-Modular Analog Synthesizer and Step Sequencer

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Grandmother is a semi-modular analog synthesizer with a built-in arpeggiator, sequencer and spring reverb tank. Start playing immediately with “no patching required”, and then explore an infinite sonic playground with Grandmother’s reconfigurable front panel.

Grandmother’s circuits, spring reverb, and spirit are inspired by the classic Moog Modular Synthesizers, making this instrument a powerful addition to a Mother-32, DFAM or any Eurorack modular system.


  • Semi-modular monophonic analog synthesizer with 41 patch points
  • 32-note, velocity-sensitive Fatar keybed
  • Built-in spring reverb can process internal and external sounds
  • Semi-modular design — no patching required, but ready to integrate with Eurorack
  • All normalized connections can be interrupted, for complete modular integration
  • Flexible arpeggiator/sequencer, with 3 preset locations for your favorite sequences (up to 256 notes each)
  • 2 oscillators with triangle, saw, square, and pulse waveforms, with PWM and Linear FM inputs
  • 4-pole, 10Hz-20kHz ladder filter
  • 1-pole highpass filter
  • Analog ADSR envelope generator with dedicated fader for sustain-stage manipulation
  • Analog LFO can reach audio rates
  • MIDI connectivity via DIN MIDI in/out/thru and USB
  • 41 patch points include 21 inputs, 16 outputs, and a parallel-wired 4-jack passive mult
  • 1/4" audio input for external signals


  • Type:Semi-modular Synthesizer
  • Analog/Digital:Analog
  • Number of Keys:32
  • Type of Keys:Fatar Keyboard, Velocity-sensitive
  • Other Controllers:Mod Wheel, Pitchbend Wheel, Variable Glide
  • Polyphony:Monophonic
  • Oscillators:2 x Analog VCO, White Noise Generator
  • LFO:1 x Analog LFO with Audio
  • Filter:4-pole 24dB/octave Ladder filter , Variable Highpass Filter
  • Envelope Generator:1 x ADSR
  • Effects Types:Spring Reverb
  • Arpeggiator:Yes
  • Sequencer:256 steps per sequence, store up to 3 sequences
  • Audio Inputs:1 x 1/4" (instrument in), 1 x 1/8" (reverb in)
  • Audio Outputs:1 x 1/4" (main/headphones), 1 x 1/8" (reverb out), 1 x 1/8" (eurorack out)
  • Headphones:Shared with main out
  • USB:1 x Type B
  • MIDI I/O:In/Out/Thru/USB
  • Other I/O:Clock in, Clock out, Reset in, On/Off in, 41 x Patch Points
  • Power Source:12V DC 2A power supply (included)
  • Height:5.5"
  • Width:23"
  • Depth:14.25"
  • Weight:16 lbs.