intellijel/morgasmatron
Morgasmatron
Analog self-oscillating dual six-mode filter with crossfader, serial/parallel routing, ProCo Rat-modelled overdrive on Filter A, Q-Drive resonance saturation, phase inversion on Filter B, and ring modulation capability via XFADE with phase-inverted Filter B.1037
Capabilities 3
- Dual Multimode VCFdual-multimode-vcf
- 1037
- Ring Modulatorring-modulator
- Ring modulation achieved by phase-inverting Filter B, setting both filters to DRY, and balancing XFADE to noon so the two out-of-phase signals cancel. An external audio signal at XFADE CV then creates ring modulation sidebands.1037
- Self-Oscillating VCOself-oscillating-vco
- Both filters self-oscillate at maximum Q, producing pitched sine waves that track 1V/OCT inputs, enabling dual sine wave VCO operation.1037
Jacks 14 (11 in / 3 out)
| Name | Signal | Voltage | Description |
|---|---|---|---|
| Inputs (11) | |||
| A 1V/OCT | cv | — | Dedicated 1V/oct pitch CV input for Filter A cutoff tracking. Normalled to Filter B's 1V/OCT jack. When filter is used as oscillator at max Q, acts as pitch input.1037 |
| A FM1 CV | cv | — | 1037 |
| A FM2 CV | cv | — | Second CV input for Filter A cutoff modulation. Normalled to Filter B FM2. Paired with FM2 attenuverter knob for depth and polarity control.1037 |
| A IN | audio | — | Audio input to Filter A.1037 |
| A Q CV | cv | — | CV input for controlling Filter A resonance (Q).1037 |
| B 1V/OCT | cv | — | Dedicated 1V/oct pitch CV input for Filter B cutoff tracking. Normalled from Filter A's 1V/OCT when nothing is plugged in.1037 |
| B FM1 CV | cv | — | 1037 |
| B FM2 CV | cv | — | Second CV input for Filter B cutoff modulation. Normalled from Filter A FM2 when nothing is plugged in.1037 |
| B IN | audio | — | Audio input to Filter B.1037 |
| B Q CV | cv | — | CV input for controlling Filter B resonance (Q).1037 |
| XFADE CV | cv | — | CV input for controlling XFADE balance between Filter A and Filter B at MIX output. Passes through XFADE Attenuverter and sums with XFADE knob position.1037 |
| Outputs (3) | |||
| A OUT | audio | — | Audio output of Filter A.1037 |
| B OUT | audio | — | Audio output of Filter B.1037 |
| MIX OUT | audio | — | Outputs a blend of Filter A and Filter B, with relative amounts set by XFADE knob and its CV input.1037 |
Parameters 24
| Name | Type | Range | Behavior |
|---|---|---|---|
| A CUTOFF | knob | — | Sets the cutoff frequency of Filter A. Knob position is combined with FM1 and FM2 CV inputs.1037 |
| A DRY | switch | — | When set to Dry (up position), bypasses Filter A so its output is identical to its input. Combined with XFADE and MIX out, enables wet/dry mixing of the filtered versus unprocessed signal.1037 |
| A FM1 | knob | — | Controls attenuation of FM1 input for Filter A. When fully clockwise, FM1 tracks 1V/oct, but a dedicated 1V/OCT jack is provided for pitch tracking, freeing FM1 for other modulation.1037 |
| A FM2 | knob | — | Attenuverter controlling amount and polarity of FM2 input for Filter A. Maximum positive effect fully clockwise, maximum inverted effect fully counter-clockwise, no effect at noon.1037 |
| A IN | knob | — | Sets the drive/amplification of the input signal for Filter A. Unity gain for a typical 10Vpp Eurorack signal is at noon; turning past noon increases level and induces soft clipping.1037 |
| A MODE | knob | — | Cycles through the six filter modes for Filter A: LP2, LP1, BP1, HP1, HP2, BR1.1037 |
| A OVERLOAD LED | menu_setting | — | Monitors Filter A output and illuminates when the signal enters soft clipping.1037 |
| A Q | knob | — | Sets the resonance of Filter A. Knob position is combined with the Q CV input. At maximum, the filter self-oscillates.1037 |
| A Q-DRIVE | knob | — | Feeds resonance back into Filter A to counteract the MS-20 topology's tendency to drown out resonance at high input amplitudes. Adds a warming growl at mid-Q values. At self-oscillation, soft-clips the sine wave for a slightly squared waveform with more harmonic content. Has no effect when Q is turned down.1037 |
| B CUTOFF | knob | — | Sets the cutoff frequency of Filter B. Knob position is combined with FM1 and FM2 CV inputs.1037 |
| B DRY | switch | — | When set to Dry (up position), bypasses Filter B so its output is identical to its input. Enables wet/dry mixing when combined with XFADE and MIX out.1037 |
| B FM1 | knob | — | Controls attenuation of FM1 input for Filter B. When fully clockwise, FM1 tracks 1V/oct, but a dedicated 1V/OCT jack is provided for pitch tracking.1037 |
| B FM2 | knob | — | Attenuverter controlling amount and polarity of FM2 input for Filter B. Maximum positive effect fully clockwise, maximum inverted effect fully counter-clockwise, no effect at noon.1037 |
| B IN | knob | — | Sets the drive/amplification of the input signal for Filter B. Unity gain for a typical 10Vpp Eurorack signal is at noon; turning past noon increases level and induces soft clipping.1037 |
| B MODE | knob | — | Cycles through the six filter modes for Filter B: LP2, LP1, BP1, HP1, HP2, BR1.1037 |
| B OVERLOAD LED | menu_setting | — | Monitors Filter B output and illuminates when the signal enters soft clipping.1037 |
| B Q | knob | — | Sets the resonance of Filter B. Knob position is combined with the Q CV input. At maximum, the filter self-oscillates.1037 |
| B Q-DRIVE | knob | — | Feeds resonance back into Filter B to maintain resonance levels at high input amplitudes, providing a warming growl at mid-Q values. Has no effect when Q is turned down.1037 |
| OVERDRIVE | switch | — | Overdrive distortion modelled after the Proco Rat guitar pedal, applies to Filter A only.1037 |
| PHASE INVERT | switch | — | Inverts the phase of Filter B's signal fed to the XFADE crossfader. Primary use is ring modulation (combined with DRY switches and XFADE at noon), but also creates subtly different timbres when blending the two filters at MIX output.1037 |
| SERIES/PARALLEL | switch | — | Switch that selects signal flow routing. Series (up): output of Filter A feeds directly into Filter B. Parallel (down): both filters process the signal independently.1037 |
| XFADE | knob | — | Sets the crossfade balance between Filter A and Filter B at the MIX output. At noon both filters are equally present; clockwise increases Filter B; counter-clockwise increases Filter A.1037 |
| XFADE ATTENUVERTER | knob | — | Attenuverter for the XFADE CV input. At noon, XFADE CV has no effect. Clockwise increases CV's influence toward more Filter B; counter-clockwise increases influence toward more Filter A.1037 |
| XFADE BALANCE LED | menu_setting | — | Visual indication of the current XFADE crossfade amount between Filter A and Filter B.1037 |
Firmware history 0 versions
No firmware history recorded.
References 2
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[1037]
Intellijel Morgasmatron Manual (2021.08.03)manual● verified 2026-05-29
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[1038]
Intellijel Morgasmatron product pageproduct_page● verified 2026-05-29