The M3X is a hand-built, drift-free, MIDI-controlled, rack-mount analog synthesizer from Scottish synth designer Ken MacBeth. The M3X is similar to the Minimoog in that it features three oscillators and a transistor-ladder filter for warm analog sounds in a simple, streamlined package, although the M3X goes beyond the original Moog. The M3X has been designed to operate via MIDI or traditional 1V/Octave control voltage input and output, as well as the standard S Trig interface as used by many analog systems.
The M3X has three dedicated oscillators, each with five waveform types and user selectable destinations including cross-modulation capabilities. In addition to the oscillators, there is a noise generator and an external audio input amp for processing other synths or sound sources. The filter section is a transistor-ladder type similar to that used in the Moog synthesizers and sounds totally warm and at times harsh (a good harsh). It offers 24dB/oct low-pass filtering with controls for frequency cutoff, resonance, envelope amount, attack, decay/release and sustain. The voltage-controlled amplifier also features attack, decay/release and sustain controls. The Mixer section offers volume controls for each of the oscillators, noise generator and external audio input plus a master volume. The digital menu system provides access to the MIDI, LFO, Portamento, and various tuning and scaling parameters. Absolutely simple, hands-on and easy to understand but full of big beefy analog sounds.