intellijel-tetrapad

Intellijel Tetrapad

Four-pad expressive touch controller with eight CV outputs

20 HP Eurorack module

Tetrapad is a versatile multi-dimensional touch-sensitive performance controller for Eurorack, featuring four force-sensing resistor pads that respond to both vertical position and finger pressure. It operates across multiple modes including a flexible Combo Mode where each pad can independently function as a fader, LFO, drum pad, switch, or bipolar fader, plus dedicated keyboard, chord, and voltage storage modes with eight independent CV outputs.

Features

  • Four touch-sensitive pads responding to both vertical position and finger pressure via force-sensing resistors
  • Eight independent CV outputs
  • Combo Mode allowing each of four pads to be independently assigned different functions
  • Unipolar Fader function: 0V to +5V on left output, pressure CV on right output
  • Bipolar Fader function: negative to positive voltage with center null point
  • Drum Pad function: gate on left output, positional CV on right output
  • Switches function: two independent switches per pad (top and bottom halves)
  • LFO function: built-in LFO with selectable waveshape, polarity, and rate; pressure CV on right output
  • Keyboard Mode with 12-scale library and diatonic rotation across four outputs
  • Custom Keyboard Mode for manual note-by-note assignment
  • Chord Mode with 13-chord library plus root, rotation, and inversion control
  • Custom Chord Mode for fully manual chord entry

Controls & Jacks (27)

  • Output 1— First output jack; in Combo Mode carries Pad 1 primary signal (fader position, gate, LFO, switch); in Keyboard/Chord modes carries root pitc
  • Output 2— Second output jack; in Combo Mode carries Pad 1 pressure CV; in Keyboard Mode carries +2 diatonic shift pitch
  • Output 3— Third output jack; in Combo Mode carries Pad 2 primary signal; in Keyboard Mode carries +4 diatonic shift pitch
  • Output 4— Fourth output jack; in Combo Mode carries Pad 2 pressure CV; in Keyboard Mode carries +6 diatonic shift pitch
  • Output 5— Fifth output jack; in Combo Mode carries Pad 3 primary signal; in Keyboard/Chord modes carries vertical position CV
  • Output 6— Sixth output jack; in Combo Mode carries Pad 3 pressure CV; in Keyboard/Chord modes carries pressure CV
  • Output 7— Seventh output jack; in Combo Mode carries Pad 4 primary signal; in Keyboard/Chord modes carries trigger output
  • Output 8— Eighth output jack; in Combo Mode carries Pad 4 pressure CV; in Keyboard/Chord modes carries gate output
  • Output 1 LED— Status LED for Output 1; color indicates signal type (green=CV, blue=pitch, magenta=gate/trigger, cyan=pressure)
  • Output 2 LED— Status LED for Output 2; brightness indicates signal level
  • Output 3 LED— Status LED for Output 3; color and brightness show signal type and level
  • Output 4 LED— Status LED for Output 4; color indicates signal type
  • Output 5 LED— Status LED for Output 5; color indicates signal type
  • Output 6 LED— Status LED for Output 6; color indicates signal type
  • Output 7 LED— Status LED for Output 7; color indicates signal type
  • Output 8 LED— Status LED for Output 8; color indicates signal type
  • Shift LED— Red LED above Shift button; glows when Edit View or shift feature is active
  • Encoder 1— Multi-function push encoder for Pad 1; controls octave, latch, slew rate, voltage setting depending on mode
  • Encoder 2— Multi-function push encoder for Pad 2; selects scale, chord, or sets voltage depending on mode
  • Encoder 3— Multi-function push encoder for Pad 3; loads presets, sets root note, rotates output assignments depending on mode
  • Encoder 4— Multi-function push encoder for Pad 4; saves presets, inverts chord voicing, selects calibration output depending on mode
  • Shift— Red button that accesses secondary feature layers; toggles Edit/Performance views, enables slew rate adjustment with encoders, and enters Tu
  • Pad 1— Leftmost touch-sensitive pressure strip with 12 Level LEDs; responds to vertical position and pressure for CV control; independently assigna
  • Pad 2— Second touch-sensitive pressure strip with 12 Level LEDs; independently assignable in Combo Mode; displays mode/scale/chord selection in edi
  • Pad 3— Third touch-sensitive pressure strip with 12 Level LEDs; independently assignable in Combo Mode; displays preset number in Mode Selection
  • Pad 4— Rightmost touch-sensitive pressure strip with 12 Level LEDs; independently assignable in Combo Mode; in Chord Mode triggers the fourth chord
  • EDIT— White button; long-press to enter Mode Selection, short-press in Combo Mode to enter Pad Assignment; also exits both views when pressed agai

How-To Guides

  • Saving a Mode Preset
  • Loading a Mode Preset
  • Factory Reset a Single Mode
  • Factory Reset All Modes
  • Velocity-Sensitive Finger Drumming
  • One-Finger Jazz Chord Progression
  • Morphing Voltage Scene Changes
  • Touch-Controlled LFO Rate with Pressure Modulation
  • Expressive Gliding Melody Keyboard
  • Four-Oscillator Chord Voicing with Inversions
  • Full Performance Surface: Drums, Filter, LFO, and Keys
  • Randomized Voltage Evolution

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

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