intellijel-morgasmatron

Intellijel Morgasmatron

Dual self-oscillating multimode filters with crossfader and overdrive

20 HP Eurorack module

The Morgasmatron is a dual multimode self-oscillating VCF and crossfader featuring two completely independent six-mode filters (A and B) that can be routed in series or parallel and blended via a crossfader. Each filter self-oscillates at maximum Q for pitched sine wave oscillator duties, tracks 1V/Oct, and features its own overdrive, Q-drive, and soft-clipping circuitry. The module excels at everything from classic filter sweeps and formant simulation to ring modulation, dual oscillator synthesis, and aggressively saturated distortion.

Features

  • Two completely independent six-mode filters (LP2, LP1, BP1, HP1, HP2, BR1)
  • Both filters self-oscillate at maximum Q producing pitched sine waves
  • Dedicated 1V/Oct input per filter for pitch tracking over several octaves
  • Filter A 1V/Oct normalled to Filter B 1V/Oct (broken by inserting a plug into Filter B 1V/Oct)
  • Filter A FM2 normalled to Filter B FM2 (broken by inserting a plug into Filter B FM2)
  • Series or parallel routing switchable via toggle
  • XFADE crossfader blends Filter A and Filter B at MIX OUT
  • XFADE CV input with attenuverter for CV-controlled crossfading
  • XFADE Balance LED provides visual indication of crossfade amount
  • Overdrive circuit exclusive to Filter A for aggressive saturation
  • Q-Drive per filter feeds resonance back to prevent drowning at high amplitude
  • Soft-clipping on both filters via IN knob and Q-Drive

Controls & Jacks (38)

  • In B— Sets the input drive/amplification level for Filter B. Unity gain around 12 o'clock.
  • Cutoff A— Sets the cutoff frequency of Filter A. Combined with FM1 and FM2 inputs.
  • Dry A— Bypasses Filter A at the crossfader input when engaged, passing the unfiltered signal.
  • FM1 A— Attenuator for FM1 input modulation of Filter A cutoff. Fully clockwise tracks 1V/Oct.
  • Mode A— Selects filter mode for Filter A: LP2, LP1, BP1, HP1, HP2, or BR1 (notch).
  • Dry B— Bypasses Filter B at the crossfader input when engaged, passing the unfiltered signal.
  • In A— Sets the input drive/amplification level for Filter A. Unity gain around 12 o'clock.
  • FM2 A— Attenuverter for FM2 input modulation of Filter A cutoff. Center position is 12 o'clock with no effect.
  • Q A— Sets resonance of Filter A. Combined with Q CV input.
  • Mode B— Selects filter mode for Filter B: LP2, LP1, BP1, HP1, HP2, or BR1 (notch).
  • XFade Attenuverter— Scales and inverts the XFADE CV input. 12 o'clock is no effect.
  • FM2 B— Attenuverter for FM2 input modulation of Filter B cutoff. Center position is 12 o'clock with no effect.
  • Overdrive— Activates the overdrive circuit for Filter A, providing aggressive saturation and distortion.
  • FM1 B— Attenuator for FM1 input modulation of Filter B cutoff. Fully clockwise tracks 1V/Oct.
  • Q A— CV input for modulating Filter A resonance.
  • Q-Drive A— Adds drive to resonance of Filter A, maintaining high resonance at higher gains and soft-clipping the oscillation.
  • Phase Invert B— Inverts the phase of Filter B signal at the crossfader. Used for ring modulation and timbral variation.
  • Q B— CV input for modulating Filter B resonance.
  • Cutoff B— Sets the cutoff frequency of Filter B. Combined with FM1 and FM2 inputs.
  • Q B— Sets resonance of Filter B. Combined with Q CV input.
  • Mix Out— Blended output of Filter A and Filter B, with balance determined by XFade knob and CV input.
  • FM1 B— CV input for modulating Filter B cutoff frequency. Scaled by FM1 knob.
  • Q-Drive B— Adds drive to resonance of Filter B, maintaining high resonance at higher gains and soft-clipping the oscillation.
  • FM1 A— CV input for modulating Filter A cutoff frequency. Scaled by FM1 knob.
  • XFade— Crossfades between Filter A and Filter B at the MIX output. 12 o'clock is equal blend.
  • Out B— Audio output of Filter B.
  • XFade CV— CV input for modulating the crossfade between Filter A and Filter B. Scaled by XFade Attenuverter.
  • 1V/Oct A— Dedicated 1V/octave input for tracking keyboard or sequencer pitch on Filter A. Normalized to 1V/Oct B.
  • FM2 A— Secondary CV input for modulating Filter A cutoff frequency. Scaled and inverted by FM2 knob. Normalized to FM2 B.
  • FM2 B— Secondary CV input for modulating Filter B cutoff frequency. Scaled and inverted by FM2 knob.
  • 1V/Oct B— Dedicated 1V/octave input for tracking keyboard or sequencer pitch on Filter B.
  • Series/Parallel— Switches filter routing: Series (up) cascades Filter A into Filter B; Parallel (down) processes independently.
  • Out A— Audio output of Filter A.
  • In B— Audio input to Filter B.
  • In A— Audio input to Filter A.
  • XFade Balance— Visual indication of crossfade position. Left brightness shows Filter A level, right shows Filter B level.
  • Overload LED A— Illuminates when Filter A output soft-clips.
  • Overload LED B— Illuminates when Filter B output soft-clips.

How-To Guides

  • Dual Sine Wave Oscillator
  • Self-Contained Synth Voice
  • Ring Modulator
  • Overdrive With Tone Control
  • Overdrive With Wet/Dry Control
  • Formant / Vowel Filter
  • Contrary Motion Notch/Bandpass Sweep
  • Stacked Filters for Steeper Slope
  • Dual Independent Audio Processing
  • CV-Controlled Filter Morph

Explore the interactive Morgasmatron panel on BleepDex — tap any control to learn what it does.

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