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Grandmother is a sonic playground that harkens back to Moog's modular roots, where synthesis is not only about the end result, but the journey of discovery and experimentation. While capable of highly complex sounds and modulation, Grandmother's semi-modular design requires absolutely no patching, ensuring that human beings of any skill-level can easily explore and experience the joys and magic of analog synthesis. 

Inspired by the classic Moog modular synthesizers that came before it, Grandmother's sound engine, modulation engine and onboard spring reverb tank are completely analog, resulting in an unrestricted sonic vocabulary of immeasurable beauty and power. In addition, Grandmother also features an easy to use Arpeggiator and Sequencer for added enjoyment and programmable syncopation. 

Though not required, creative patching and exploration are the keys to discovering exciting new relationships between modules and to truly unlocking Grandmothers infinite expanse of auditory inspiration. Patching can also be used to override internal connections, allowing each section to function just as an independent module would. 

In addition to its standalone function, Grandmother is also an ideal analog audio processor for external sound sources, and a powerful keyboard front end for expanding a Mother-32, DFAM or Eurorack modular system.

• Hardware Spring Reverb can be used to process external sounds
• 1/4" External audio input for guitars, drum machines, and more.
• Semi-modular - no patching is required
• Easy to use Arpeggiator and Sequencer 
• Store up to 3 sequences with up to 256 notes each
• 2 Analog Oscillators with selectable waveshape and hard sync
• Classic 4-Pole 10Hz-20kHz Ladder filter 
• Patchable 1-Pole High Pass filter
• Analog ADSR Envelope Generator
• Analog LFO with audio-rate capabilities
• 32-note Fatar keyboard with velocity 
• All normalized connections can be interrupted for full modularity
• DIN MIDI In/Out/Thru and USB MIDI
• Patchable bipolar attenuator
• Works with Mother-32, DFAM, Eurorack modular systems and more
• 41 patch points with 21 inputs, 16 outputs and a Parallel-Wired 4-jack Mult

- Oscillators based on Moog Minimoog 
- Mixer based on Moog CP3
- Filter based on Moog 904
- Envelope Generator Based on Moog 911
- VCA Based on Moog 902
- Spring Reverb based on Moog 905


TYPE: Semi-Modular Analog Synthesizer


NUMBER OF KEYS: 32 Full-Size Keys

TYPE OF KEYS: Velocity-sensing (Velocity signal is not hard-wired available via MIDI and KBD VEL OUT jack)

OTHER CONTROLLERS: Pitch Bend, Mod Wheel, Variable Glide

POLYPHONY: Monophonic

SOUND SOURCES: 2 Oscillators with selectable Waveforms (Oscillator 2 supports Sync to Oscillator 1 plus linear FM), 1 White Noise Generator, External Input jack

VCF FILTER (LOW PASS): -24dB/Octave Moog Ladder Filter with Resonance (Self-Oscillating)


MOD SOURCES: Modulation Oscillator (Sine, Sawtooth, Ramp, Square), S/H Output, plus Envelope and Key Tracking



MULT: Four Parallel-wired Non-buffered Patch Points

EFFECTS: Spring Reverb

ARPEGGIATOR / STEP SEQUENCER: (256 Steps; three Sequence Files)

- 41 x 3.5mm front and rear panels
- 21 Inputs
- 16 Outputs
- 4 Parallel-wired Mults.

AUDIO INPUT: One 1/4" TS jack (Rear Panel)

AUDIO OUTPUT: One 1/4" TRS jack for headphones or line level output (Rear Panel)
WARNING: Use a TS instrument cable for line output applications. Do not use a TRS (balanced) cable, or phase cancellation may cause a very weak signal.

MIDI I/O: 5-pin DIN In, Out, Thru; plus MIDI over USB (Rear Panel)

POWER: Included Power Adapter 12V DC (positive tip), 2A, 100 to 240 Volts AC, 50/60Hz

DIMENSIONS (W x D x H): 23" x 14 1/4" x 5 1/2" (54.82 x 36.19 x 13.97cm) 
WEIGHT: 16 lbs. / 7.25 kg

Moog Grandmother Semi-Modular Analog Synthesizer