MOTM-300 Ultimate VCO

MOTM-300 ultra vco (MOTM300master) by

MOTM-300 Ultimate VCO


MOTM-300 Ultimate VCO

Full kit includes everything you need-- rare parts, panel, pcb, bracket, mounting hardware, pcb and panel components etc

This is the flagship MOTM module!

The MOTM-300 Ultra VCO represents a milestone in analog synthesizer design. Using only the finest available circuitry, the Ultra VCO has unmatched performance where it's needed most: stability and tracking. Using 4 separate temperature compensation servo loops, the average drift over 12 hours is typically 0.01% or about thirty times better than a Moog 921B VCO! Why do we call it the Ultra VCO? Because the tracking circuitry uses an ultra-matched differential pair transistor array that will hold over a minimum of 15 octaves. That's twice the range of a piano! Although we put the focus of the design on stability, the MOTM-300 is a full-featured VCO. Sine, saw, triangle, and pulse waveforms are all available simultaneously. PWM (Pulse Width Modulation) with initial pulse width and depth creates complex spectra. Other features include:


  • Dedicated 1V/Oct input with military-spec 25ppm 0.1% summing resistor
  • 2 separate Frequency Modulation (FM) inputs, each with it's own attenuator
  • Linear FM with switchable AC or DC coupling
  • PWM (Pulse Width Modulation) from DC to over 15Khz
  • Hard and Soft sync option with Master Sync I/O jack
  • Low power consumption, only requires +/-15VDC @ 60ma
  • All audio signals wired with coaxial cable for lowest noise and crosstalk
  • Low-drift op amps and precision resistors used throughout
  • 10 volts peak-peak audio outputs
  • Frequency range from 0.2Hz to over 38Khz


The cornerstone of any synthesizer is the VCO. We feel the MOTM-300 Ultra VCO has "raised the bar" and is, quite simply, the most accurate and best-sounding analog VCO ever offered.


Various types of linear FM timbres

Weird and wacky FM

Basic pulse lead sound over sampled drums

Square wave voice through Moogerfooger analog delay

Chaotic FM feedback

Strange clangorous FM

Module Parameters

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  • from $35.00 TO $499.00
  • Ex Tax: $35.00

Available Options

In stock / $45.00
Available : 4
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synthCube assembled, new
Out of Stock - $499.00
In stock / $35.00
Available : 63
synthCube kit
In stock / $349.00
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Tags: motm-300, ultra, vco, synthesis, technology diy, kits motm300master oscillator motm300mstr analog, modular ultimate synthesizer