Download macOS
Standalone and AU, VST
Free 7 day trial /
$69 Full Version

iPad App
Coming Soon…

Download Windows
Standalone and VST Free 7 day trial /
$69 Full Version

Every Bit Analog

Microvolt 3901 is a component level emulation of the Pittsburgh Modular Microvolt 3900 plus a collection of classic Pittsburgh Modular Eurorack modules from throughout our history, together in one fully patchable instrument. The original instrument and Eurorack modules have been meticulously modeled at a component level to capture the warm sound and unique quirks of the original machines. Patch cables route audio and cv (control voltage) signals between modules to create unique, polyphonic sounds. Play it standalone or use it as a VST, AU, AUv3(iOS) plugin.

A Collection of Oscillators

Built on the architecture of the Microvolt but expanded to include some of our best sounding and most unique oscillator modules. Each of the included oscillators provides a different sound palette and feature set to experiment with.
Oscillators include: Microvolt Oscillator, Lifeforms SV-1 Oscillator, Primary Oscillator (taken from Voltage Lab mini), Generator (strange), Voltage Controlled Oscillator 2 (based on Microvolt oscillator core), and two digital lo-fi oscillators we designed in 2016. Double Helix Wavetable Processor and DNA Symbiotic Waves Waveform Processor.

More Modulation

The Microvolt 3901 includes an assortment of fully patchable modulation modules from throughout the history of Pittsburgh Modular. These modulators provide a wide range of functionality and inspiration. Modulators include: VILFO (our first Eurorack module!), Dual LFO, Function Generator, Game System, Microvolt Modulation Sources, Three Stage Envelope, Envelope Generator, Modulation Oscillator, Sample & Hold, and Ring Modulator.

Our Favorite Effects

Nineteen of our favorite effects including some amazing Pittsburgh Modular effects modules, pedal clones, and open source gems. The effects can be used at the end of the signal chain or patched within the synth for new types of sounds. Effects include: Fragments, Crow Filter, Lo-Fi Tape, Flanger, Phaser, Chorus, Local Florist, Digital Delay, BBD Delay, 2399 Delay, Reverb, Verbtronic, 28 Verb, Fuzz, Overdrive, Resonator, Texture, Bit Crush, and Compressor.

More Information

• Six-voice polyphony, or monophonic with up to six unison voices

• Built-in oscilloscope and spectrum analyzer

• Built-in User Manual

• MIDI input, Ableton Link and host sync

• Standalone iPad app and AUv3 plugin instrument

• Standalone Windows App and VST plugin instrument

• 200 factory presets, 100 steps of undo, and preset import and export

• Microvolt 3901 includes a complete user manual, built in. Tap the ? in any module's title bar to read about it.

• Hearing Safety: Resonance, feedback patches and long delays can raise the level suddenly. Start with a low volume.

• macOS Info: macOS 12 Monterey or later - Apple silicon or Intel Mac - Formats: Audio Unit, VST3, standalone app,

• Windows Info: Windows 10 or Windows 11, 64-bit, Windows 11 ARM64 - Formats: VST3, standalone app.

• iPad Info: iPadOS 15 or later - Formats: standalone app and AUv3 Audio Unit instrument.

• An internet connection to activate, or offline activation using a machine file - One activation covers every format on the computer - The license is checked online from time to time; a computer that has not been online for 7 days is asked to check again - 7-day free trial available for macOS and Windows. iPad purchases are made through the App Store and need no activation.

• Recommended - MIDI keyboard or controller (optional: the instrument has its own keyboard and sequencer) - A multi-core processor; polyphony, unison and higher oversampling settings increase processing load.