Fully Assembled and Calibrated.

The MSW-810 is a faithful recreation of the CMU-810 Monosynth which was designed as a synth expander for the 1983 CMU-800 computer music production system. At its core however, is the tone generator of the MC-202.

Specifications:

VCO

AS3340 Based
Range: 16'/8'/4'/2'
Pulse Width Modulation: 50% to Min
PWM Mode: ENV/Manual/LFO
Modulation Depth
Tune

Sound Mixer

Level Control Sliders: Square, Saw, Sub-OSC, Noise
Sub-OSC Waveforms: 1 oct down, 2 oct down, 2 oct down PWM

VCF

AS3109 Based
Cutoff Frequency: 10Hz to 20kHz
Resonance: 0- Self Oscillation
ENV Depth
Modulation Depth
CV Follow: 0-100%

VCA

Gate or Envelope

Envelope

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

LFO

Rate: 0.1Hz to 20 kHz
Delay Time: 20 ms to 0.7s
Rate Indicator

VCA + Mixer

Level Control Sliders: Synthesizer, Input 1, Input 2, Output
VCA Bypass Switch
VCA Response: Lin/Exp

Jacks

Synth CV in: 1V/Oct, 0-7V, 3.5mm TS
Synth Gate in: 0-12V, On>2.5V, 3.5mm TS
VCA CV In: Lin 0.83 to 5V, Exp 0.83-4.58V, 3.5mm TS
Input 1: Unbalanced 1/4" TS
Input 2: Unbalanced 1/4" TS
Synth Out: Max -6 dBm, Unbalanced 1/4" TS
Mix Out: Max -10 dBm, Unbalanced 1/4" TS
Headphone Out: Stereo, 9-150 ohm, 3.5mm TRS
MIDI In: 3.5mm TRS (1.5m cable included)
MIDI In: USB C (1.5m USB C-USB A included)

MIDI

Control of Note/Gate ONLY

USB C
TRS MIDI Universal

Power

9V DC, 500 mA, Tip positive. 120-240V Included

Dimensions

13"x2.5"x8"

Includes: Universal power supply, MSW-810 Synthesizer, 1.5m TRS A MIDI Cable

Firmware Updates:

V1: (11/3/2022) MSW810MIDI_1_00.uf2

To update firmware, send the boot to bootloader command (f0 7d 08 10 0b f7) over USB MIDI only, a window will open, copy firmware to that folder, confirm when prompted and that's it! If you have a serial number below 28, please contact me for further instructions on how to update.

MIDI IMPLEMENTATION CHART:

Sysex	Default	Function	Values (XX)
f0 7d 08 10 0c xx f7	0	Change Channel	0-15	0 = Channel 1, 1 = Channel 2, ...15 = Channel 16
f0 7d 08 10 0b f7		Boot to Bootloader
f0 7d 08 10 0f f7		Calibration
f0 7d 08 10 0a f7		Quick Calibration
f0 7d 08 10 0d xx f7	2	Root Octave	0-5
f0 7d 08 10 0e xx f7	HIGH NOTE	Note priority	0-2	0 = LOW NOTE, 1 = HIGH NOTE, 2 = LAST NOTE

Demos:

AS3109 IC on DIP adapter

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