intellijel/midi-1u

MIDI 1U

Intellijel

14HP 1U class-compliant MIDI-to-CV interface. Receives MIDI from an attached external MIDI input connector (7U case, Palette case, or MIDI IN Jacks 1U module). Works in Single Mode (one monophonic synth: PITCH, VEL, MOD, CC, GATE, TRIG, CLK, RST outputs) or Dual Mode (two monophonic synths sharing the same jacks). Expandable with up to four CVx 1U modules for polyphonic and drum operation.677

Capabilities 1

MIDI to CVmidi-to-cv
Converts MIDI (USB and DIN) to CV/gate. Single Mode outputs PITCH (1V/oct ±5V), VEL (0–5V), MOD (CC#1 by default), CC (CC#2 by default), GATE, TRIG, CLK, RST for one monophonic synth. Dual Mode repurposes MOD/CC/TRIG as PITCH/VEL/GATE for a second synth.677

Jacks 8

NameSignalVoltageDescription
Outputs (8)
CCcv-5V to 5VSingle Mode: CV output for synth 1, default Breath Control (CC#2), configurable to any CC or aftertouch; unipolar 0–5V or bipolar ±5V. Dual Mode: repurposed as velocity output for synth 2 (0–5V).677
CLKclockClock output transmitting a divided MIDI clock pulse. Division set by the CLK÷ button or Config app.677
GATEgate0V to 5VGate output for synth 1. High (5V) while a note is held on synth 1's MIDI channel. Always outputs synth 1 gate in both Single and Dual mode.677
MODcv-5V to 5VSingle Mode: CV output for synth 1, default Mod Wheel (CC#1), configurable to any CC or aftertouch; unipolar 0–5V or bipolar ±5V. Dual Mode: repurposed as 1V/oct pitch output for synth 2 (±5V).677
PITCHcv-5V to 5V1V/oct CV output for synth 1. Range ±5V. MIDI note 0 (C-2) = -5V, note 120 (C8) = +5V. Always outputs synth 1 pitch in both Single and Dual mode.677
RSTmixed0V to 5VConfigurable as RESET (trigger on MIDI reset/start messages) or RUN (gate high 5V while MIDI clock running, low 0V when stopped).677
TRIGtrigger≤5VSingle Mode: +5V trigger output for synth 1 on MIDI Note On; default trigger length 5ms, configurable. Dual Mode: repurposed as gate output for synth 2 (high 5V while note held).677
VELcv0V to 5VVelocity output for synth 1. Range 0–5V proportional to MIDI velocity. Always outputs synth 1 velocity in both Single and Dual mode.677

Parameters 13

NameTypeRangeBehavior
CLK DIVbuttonIn normal operation: pressing repeatedly cycles through clock divisions of MIDI clock (/1=24ppq, /3=32nd, /6=16th, /12=8th, /24=quarter, /48=half, /96=whole notes). In LEARN mode (solid or flashing blue): toggles the CC or MOD jack CV output between unipolar (green) and bipolar (red/green).677
Clock Divisionmenu_settingSelects from /1 (24ppq), /3 (32nd notes), /6 (16th), /12 (8th), /24 (quarter), /48 (half), /96 (whole) divisions of the incoming MIDI clock. Divided clock sent out CLK output.677
Coarse Tuningmenu_setting-60semitone – 60semitone677
LEARNbuttonCycles through three states: OFF (normal operation), SOLID BLUE (LEARN CC+CH mode — awaits MIDI to set synth 1 channel and CC jack assignment), FLASHING BLUE (LEARN MOD+CH mode — awaits MIDI to set synth 1 channel and MOD jack assignment). Long-press (>2 sec) toggles between Single and Dual mode. In Dual Mode glows yellow; press once for red (learn synth 1 channel), double-press for flashing red (learn synth 2 channel).677
Maximum Pitchmenu_setting0 – 127677
MIDI Channelmenu_setting1 – 16677
Minimum Pitchmenu_setting0 – 127677
MOD CV Polaritymenu_setting677
MOD Output Typemenu_settingSingle Mode only. Selects the signal type for the MOD jack: Clock (Always), Clock (Running), Reset, Run, CC Number, CC Number (High Res), Pressure (Aftertouch), Pitch, Gate, Trigger, or Velocity. Default is CC Number (Mod Wheel, CC#1).677
Module Modemenu_setting677
Pitch Bend Rangemenu_setting1semitone – 48semitone677
RST Outputmenu_setting677
Trigger Lengthmenu_setting5ms – 100ms677

Firmware history 10 versions

VersionReleasedNotes
1.2.6.02023-10-05Extended the assignable CCs available to the full range, 0-127. Requires Intellijel Config App v1.4.3.0 or higher.677
1.2.4.02022-11-03Fixed instability with onboard DAC introduced by v1.2.2 increased rates (module appeared to hang on boot intermittently). Communication rate reduced but still double that of pre-1.2.2 versions.677
1.2.2.02022-09-15Increased communication rates with CVx. Only noticeable when using 2 or more CVx modules.677
1.2.1.02022-03-18Improves connection reliability over USB MIDI with Intellijel Config App. Requires Config App v1.2.1 or higher.677
1.22021-12Added portamento mode: slews pitch CV between notes with constant time via CC 65 (on/off) and CC 5 (time, 0–1.1s). Added Gate (Any) output type for paraphonic operation. Added arbitrary clock dividers (1–192) for assignable MOD/CC outputs and CVx expander outputs.677
1.1.32021-05-26Increased maximum held notes in Mono Synths to 16. Fixed assignment of MOD and CC outputs to sources other than Controllers.677
1.1.22021-02-02Fixed 'All Notes Off' messages incorrectly resetting output CV (now only gates are reset). Added handling of 'Reset All Controllers' CC 121 messages.677
1.1.12021-01-28Fixed monophonic notes not retriggering in some instances.677
1.1.02021-01-09Added support for CVx expander modules. Restructured UI in the Intellijel Config app to support synth-focused (rather than channel-focused) configuration.677
1.0.0.12020-10-06Initial Release677

References 2

  1. [677]
    Intellijel MIDI 1U Manual v1.2 (2026-01-06)manual
    verified 2026-05-21
  2. [678]
    Intellijel MIDI 1U product pageproduct_page
    ⚠ verified 2026-05-21 · manufacturer changed since last verified