Coming Janurary 2026

MSW-820 is a 2 oscillator based analogue monosynth with an advanced 16 mode voltage controlled filter, 2 envelope generators, digital LFO with sync and trigger functions, digital noise source with 8 flavors, MIDI (TRS or USB), all in a compact desktop or euro format.

Specifications:

VCOs

AS3340 Based, Pulse and Sawtooth Waveforms
ENV Modulation (OSC1) and LFO Modulation (OSC2)
Range: 16'/8'/4', 7 Octaves
Pulse Width Modulation: 50% to Min
PWM Mode: ENV/Manual/LFO Modulation
Master and OSC2 (offset) Tune Control
Pulse/Sawtooth Mixer control per Oscillator
2 Hard Sync Modes: O2 Track Pitch or O2 Do not track pitch
2 Reset Modes: Reset O1 on gate or Reset O1 and O2 on gate

Sound Mixer

External Input (pre filter)OSC 1 Level
OSC 2 Level
Sub Osc Level tracking OSC1 with 1, 2, and 2 PWM Octave Settings
Noise Level with 8 Noise Models:
White, Pink, Hex Invert, Crackle, Orgone (pitched), Sonar (pitched)

VCF

AS3109 Base16 Modes. Low Pass, High Pass, Band Pass, Allpass (aka Phase)
Cutoff Frequency: 10Hz to 20kHz
Resonance: 0- Self Oscillation
CV Follow: 0-100%
This knob (Audio rate filter modulation from OSC1's triangle output)
Envelope Modulation via Attenuverter (-5 to 10)
LFO Modulation via Attenuverter (-5 to 10)
Pitch Modulation via Attenuverter (-5 to 10)
External CV Modulation via Attenuverter (-5 to 10)

LFO

Rate: 0.1 Hz to 22 Hz8 Shapes with crossfade between shapes:
Sine, Square, Ramp, Tri, Saw, Expo Decay, Random, Smoothed Random
2 Reset Modes. Reset on Gate and Reset on Gate with Phase Control (via Fade knob)
Fade Control (LFO Delay with Fade in)
Bipolar Rate indicator

Envelopes

Attack time: 1.5 ms to 2 s
Decay time: 2 ms to 10 s
Sustain Level: 0-100%
Release Time: 2 ms to 10 s
Modulation Envelope is hardwired to Modulation bus
VCA Envelope is hardwired to VCA

VCA/Output Mixer

VCA Control
External Input (post filter/Env)

Inputs/Outputs

MIDI IN. TRS 3.5mm PSIMIDI (either A or B)
Clock IN to Control LFO Rate**
Gate IN. 5-10V*
V/Oct IN*
Filter CV IN
LFO Mod IN
Audio IN
Synth/Mix OUT
USB C IN/OUT. 5V Power 200 mA. DC Adapter included. Also serves as USB MIDI

*Analog inputs override MIDI

**Overrides MIDI clock, switches LFO to clocked mode

MIDI Control/ MIDI Features

LFO Shape CC# 14
LFO Rate (divisor when clocked) CC# 20
LFO Reset to phase CC# 22
LFO sample and hold/release (switch @ 64) CC# 23
Pitch bend up range* CC# 3
Pitch bend down range (use up range if zero)* CC# 86
Filter freq (via ExtCv slider) CC# 74
Noise select* CC# 30
Noise click mode (switch @ 64) CC# 89
Porta time* CC# 5
Porta on/off (switch @ 64)** CC# 65
Porta “glide mode” (switch @ 64) CC# 85
Mod wheel CC# 1
Mod depth(LFO to Pitch amount in semitones)* ??
Velocity to filter mod amount* ??

*Setting is saved

**saved, but only activated when MIDI is detected

Power

5V DC, 200 mA USB C (Adapter Included)

Dimensions

220x120x50 900g

Caveman Modules Mul. 2HP Two Channel Passive Multiple

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