Moog Mavis Semi-Modular Analogue Synthesizer


Mavis is a build-it-yourself analogue synthesizer kit that delivers the huge depth of sound Moog is known for in a compact and feature-packed instrument. Mavis is standalone instrument which can also slot nicely into your Eurorack setup or Moog semi-modular system. 

  • Simple, build-it-yourself kit
  • 24-point patch bay
  • Single VCO with pulse width modulation, waveform mixing & mod source mixing.
  • -24dB low-pass ladder filter, audio rate LFO and 4-stage envelope generator.
  • Patchable sample & hold circuit - generates a random CV pattern that can be used to modulate other parameters.
Functions: Envelope Generator , Filter , Oscillator , Synth Voice , VCA , Waveshaper
Height: 3U
Width: 44hp
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Mavis is an expressive and inspiring analog synthesizer with patchable modular utilities and unmistakable Moog sound and quality.

When removed from its enclosure, the instrument becomes a 24-point CV-controllable module (44HP) ready to be installed into any Eurorack setup or Moog semi-modular system. Perfect for first-time users and established synthesists alike, Mavis’s semi-modular design and one-octave keyboard allow for immediate musical exploration without the need for additional equipment (except for a speaker or headphones).

Mavis mixes the familiar with the exotic, featuring Moog’s legendary oscillator and filter circuits alongside a diode wavefolder— the first analog wavefolder to appear on a Moog instrument. Combining traditional subtractive synthesis with additive wavefolding and oozing with personality, Mavis’s clever presentation of synthesis modules and utilities makes for intuitive, creative experimentation and musical connection.

Assembling this synthesizer kit by hand invites the user to get closer to the circuits at the heart of this unique musical machine. The connection made with an instrument while building it is something inherent to the nature of all Moog synthesizers, and it has been since the days of the large format modular systems. With Mavis, users of any skill level can quickly build their analog synthesizer with minimal tools and experience (no soldering required) by using all the components included in the instrument's carefully curated packaging. Once the instrument is built, complete with its included protective cover, the owner is guided on their journey with Mavis through a selection of patch books and educational materials that encourage creative patching and sound design.

Features & Tech Specs:

  • Operate standalone or as a 44HP Eurorack module
  • Analog Voltage Controlled Oscillator (VCO); Mixable Saw/Square
  • Analog –24dB Moog Low Pass Ladder Filter
  • 4-Stage Analog Envelope Generator (EG)
  • Diode Wavefolder
  • Analog Low Frequency Oscillator (LFO); Mixable Triangle/Square
  • Pulse Width Modulation
  • Modular Utilities (Attenuators, Offsets, Mults, and a flexible DC-coupled Mixer)
  • Sample and Hold
  • Analog Voltage Controlled Amplifier (VCA)
  • 24-Point Patch Bay (3.5mm)
  • 1 Octave Keyboard with Glide and Scaling
  • 3.5mm AUDIO Output 

What's in the box?

  • PCB
  • Front Panel
  • Bottom Enclosure
  • Protective Cover
  • Power Supply
  • Nut Driver
  • Calibration Tool
  • Fastener Kit
  • 6 x 3.5mm Cables
  • Assembly Instructions
  • Quickstart Guide
  • Patch Overlays
  • Product Catalog
  • Registration Card

Full Range Analog Oscillator: Mavis’s Voltage Controlled Oscillator (VCO) with pulse-width modulation (PWM), waveform mixing, and mod source mixing delivers rich harmonic character and motion.

Voltage Controlled Filter: Sculpt your sound with the -24dB Moog Low Pass Ladder Filter, delivering the sonic power behind the distinct sounds of Moog basslines and leads.

Audio Rate LFO and 4-Stage Envelope Generator: Mavis uses crossfaders in its modulation routing instead of switches, allowing you to blend between a variable shape LFO and 4-stage envelope generator for interesting and unusual modulation contours.

Wavefolding and Modular Utilities: Mavis features Moog’s first-ever wavefolding circuit, allowing for additive synthesis to sit alongside traditional subtractive synthesis, unlocking sounds not heard from a Moog before. Mavis also features a broad modular utility section complete with attenuators, offsets, mults, and a flexible DC-coupled mixer providing the tools needed for creative patching and sound design.

Patchable Sample and Hold (S+H) Circuit:This circuit generates a random CV pattern that can be patched to modulate other parameters, including setting Mavis into a “random sequencing” mode of performance.

Protective Cover: Mavis includes a fitted protective cover for use during studio downtime or taking the instrument on the go.

  • Operate standalone or as 44hp Eurorack module Analog Voltage Controlled Oscillator (Mixable Saw/Square)
  • Analog –24dB Moog Low Pass Ladder Filter
  • 4-stage Analog EG (Envelope Generator)
  • Diode Wavefolder
  • Analog LFO (Mixable Triangle / Square)
  • Pulse Width Modulation
  • Modular Utilities (Attenuators, Offsets, Mults, and a flexible DC-Coupled Mixer)
  • Sample & Hold
  • Analog Voltage Controlled Amplifier
  • 24-Point Patch Bay (3.5 mm)
  • 1 Octave Keyboard w/ Glide and Scaling
  • Protective Cover Included
  • Patch Cables Included
  • 3.5mm Output

175 mA +12V
0 mA -12V
0 mA 5V

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Moog Mavis Semi-Modular Analogue Synthesizer