MFOS Sound Lab Mini-Synth Mk II



One of Ray Wilson's most popular projects, now available as a DIY synth kit!

Comes with the new version 17X7 panel.

Find the original MFOS documentation here: MFOS Synth DIY Info



  • Two Musically Accurate VCOs With 1V/Octave Tracking
  • White Noise Generator
  • Audio Mixer With External Input
  • State Variable VCF Low-Pass & Band Pass Response
  • VCF Doubles As 1V/Oct Tracking Sine Wave Oscillator
  • VCF Has Multiple Modulation Options
  • VCA Has Multiple Modulation Options
  • LFO (Ramp, Saw, Tri and Square)
  • Two AD/AR Generators
  • Keyboard Control Inputs
  • VCOs and VCF Normalized To Keyboard CV Input
  • AD/AR Generators Normalized To Keyboard Gate Input
  • Patchable Sample And Hold
  • Two Repeat Gate Generators for AD/AR Generators
  • AD/AR Generators Normalized For S&H Triggering


Sound Samples

SONAR Producer Edition used for mix down of all multi-track samples. All sounds are from the Sound Lab Mark II driven via a MIDI to CV convertor or MFOS Single Buss Keyboard Controller (except the last one).


Prelude and Fugue in C No. 2 - J.S. Bach

Three Part Invention in C No. 1 - J.S. Bach

Sound Lab Mark II Symphony - R. Wilson

End of a song utilizing the SLMS Mark II - R. Wilson




There are optional modifications for the LFO and VCO1 which you should review prior to starting the project. That way if either of them sounds like something you would like to include you can do it from the start and not have to modify your synth later. See the "Optional Modifications" page.


Introduction to the Sound Lab Mini-Synth Mk II

I have been wanting to design a new synthesizer that grew from the roots of the popular Sound Lab Mini-Synth design. The Sound Lab Mini-Synth Plus was the first attempt to get more mileage out of the original Sound Lab Design but the Sound Lab Mini-Synth Mk II is what I have been wanting to put together for quite a while. It is a completely new single board analog synth design with some excellent features. I believe the Sound Lab Mini-Synth Mk II is going to become a must-have analog synthesizer. I will be offering a professionally manufactured front panel and double sided, solder masked, plated through-hole PC board for this project. I have tried to make it very convenient to add this to your current synth toolbox. You will be really glad you built this synthesizer.

Whether you are a Buchla fan (I don't need no stinkin' keyboard...) or a Moog fan (Wow a keyboard, totally awesome!) you will never run out of totally amazing sounds and patches with the Sound Lab Mini-Synth Mark II. It is certain to become one of your favorite synths. The front panel includes patch points so you can experiment and explore new sounds and ideas.

The Sound Lab Mini-Synth Mark II is a great unit for gigs and/or for the studio and you'll never grow tired of the myriad of sounds the unit can produce. Make your music, sound scapes and/or movie sound tracks stand out with authentic vintage analog synth sounds. Put a Sound Lab Mini-Synth Mark II to work for you today.

-> kit does not include power supply. Power Supply kit can be found here.



On Demand Info

These kits and assembled modules are offered on demand, click the link to learn more.


Kit Parameters
Build Difficultymoderate
Parts Count476

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  • from $24.99 TO $499.00

Available Options

Full Kit
In stock / $499.00
Available : 32
panel + pc board mounting bracket
In stock / $63.99
Available : 43
partial kit- all parts, pcb, no panel
In stock / $429.00
Available : 134
pc board mounting bracket
In stock / $24.99
Available : 48
In stock / $69.00
Available : 134
In stock / $169.00
Available : 32

Tags: mfos, tabletop, diy, kits, all