Andrew John March, developer of the M0SS 101, is expanding its portfolio with a new range of compact one-knob MOSS synthesizers.
Update: now on Kickstarter
Last year, developer Andrew John March released the M0SS-101, a super-compact virtual-analog monosynth funded via Kickstarter. He raised CA$ 29490 for this project.
Following the success of the M0SS-101, the developer is now expanding its portfolio with three new MOSS synthesizers that you can support very soon on Kickstarter.
M0SS Synthesizers
The M0SS synthesizer lineup is based on the same very unique concept as the 201 from 2025. They are super compact, no screen, have a single knob, and many buttons for operating the comprehensive synth engine.
I must admit the concept wouldn’t be for me, but it’s different. Three new synthesizers will be released at once, forming an entire series.
M0SS-201 West-Coast
The M0SS-201 is a “West-Coast” Synthesizer inspired by the legendary Buchla Easel. Like the 101, it is a modern, feature-rich monosynth designed for advanced synthesis experimentation.
It will feature a complex oscillator comprising a mod and an audio oscillator, an eight-stage wavefolder, and a custom random generator. A modulatable modulation bus offers AM, FM, and TM (wavefold) modulation modes.
The engine also includes an envelope that joins the modulation oscillator and the stochastic generator as modulation sources. It has various modes (AR, ASR, and looping AR) and can be triggered from MIDI or the stochastic generator.
Also onboard is a low-pass gate and VCA, as well as a delay that covers both delay and reverb sounds. You can save up to 36 sounds in the engine.
M0SS-309 Polysynth
Then, the M0SS-309 combines elements of classic polysynths from the 70s and 80s.
Unlike the two previous synths, it’s a 9-voice polyphonic Synthesizer with 2 oscillators, a resonant filter, and two envelopes per voice.
Analog-style favorites like FM and hard sync are also onboard. It also includes a white noise generator. On the modulation side, you get two envelopes and a multi-wave LFO.
To refine your sounds, it also houses a suite of master effects, including stereo chorus with three modes, delay, and reverb with feedback. You can save up to 18 sounds in the hardware.
M0SS-416 FM Synth
Third and last of the new wave of announcements is the M0SS-416, a 6-operator FM Synthesizer with up to 16 voices of stereo polyphony based on the Yamaha DX7. Yes, it’s another DX-7-style FM synth, but there is something special.
The M0SS-416 has a labeled physical interface for each parameter, so you can design or modify sounds in real time without ever looking at a screen or diving into a menu system.
According to Andrew John March, it is fully compatible with Yamaha DX7 .sys files, so you can load any DX7 patch, using the included internal SD card, or over MIDI SYSEX.
It comes preloaded with 99 classic DX7 sounds, all editable on the hardware. Plus, you can save 99 additional sounds in the hardware.
All three M0SS synthesizers share the same I/O. On the back, there is a USB-MIDI host port, a TRS MIDI in with full MIDI CC support, and a 6.3mm stereo output
First Impression
At first glance, these are three interesting digital, portable synthesizers. They sound lovely. I’m not a fan of the operation concept, but that’s due to my way of working.
The first one was successful on Kickstarter, which tells us there’s enough interest, and we’re pretty sure these, as well as two of them, are polyphonic.
You can support the new M0SS synthesizers now on Kickstarter. Early-birds start at CA$ 175/109€, DIY kits at CA$ 180/112€, and the regular price will be CA$ 200/125€ each. Shipping starts in May 2026.
Keep in mind that crowdfunding campaigns can involve risks. See for this, the project site for details.
More information here: Kickstarter
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