GFI Systems Synesthesia Dual Engine Modulation

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Synesthesia is an advanced, yet user friendly dual-channel multi-modulation engines, capable of running two modulation algorithms simultaneously. Packed with 22 classic and modern algorithms (expandable to 30 with future updates) and 3 different DSP routing schemes Synesthesia offers limitless sonic possibilities.

Synesthesia is not just another modulation pedal. By marrying a powerful dual-engine architecture with rich and deep algorithms we provide players with immersive and 'colorful' modulation effects experience, hence the name : Synesthesia.

Up to 30 on-board algorithms - more will be made accessible via the SymmLab editor.


  • Tremolo
  • Dynamic Tremolo
  • Harmonic Tremolo
  • Chopper
  • Slow Volume


  • Filter
  • Envelope Filter
  • Sample & Hold Filter
  • Formant


  • Dimension
  • Chorus
  • Tri-Chorus
  • Detune
  • Dyane Flanger
  • Tape Flanger
  • Samnple & Hold Flanger


  • Phaser
  • Envelope Phaser
  • Sample & Holdl Phaser
  • Univibe


  • Octave Shifter
  • Vibrato
  • Rotary
  • Ring Modulator
  • Double Tracker


  • Arp Tremolo
  • Arp Filter
  • Arp Formant
  • Arp Flanger
  • Arp Phaser
  • Arp RingMod
  • Arpeggiator



  • Preset mode - conveniently recall your favorite patches from an easy-to-navigate banks of 32 presets.
  • Stompbox mode - stomp the footswitches to control the individual DSP, just like using individual stompboxes.
  • Comprehensive external control :
  • Expression Pedal - with adjustable heel and toe values.
  • Control Voltage (CV) - takes 0 - 2.5 V control voltages.​
  • Aux Switches - accepts up to 3 external switches for versatile control (tap-tempo, bank up/down, etc).
  • MIDI In / MIDI Thru - nearly all features and functionalities of the pedal are opened to MIDI access, including MIDI clock.
  • Tap-Tempo - you can tap in your tempo using an external tap pedal, via Midi, or on the pedal itself.
  • Space saving - 12 cm x 12 cm (4.7" x 3.5"), impressively small for a pedal that can replace 3 or more individual stompboxes.
  • ​Switch effects order (pre or post) effortlessly via the switchable Pre/Post configuration (specifed on per-preset basis).