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.
