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GFI System Synesthesia Dual Channel Modulation Pedal

The Ultimate Multi-Mod Machine

Written by

Elliot Stent

GFI System are renowned for their digital time-based pedals, most notably the powerful Specular Reverb and Clockwork Delay. The Synesthesia, however, represents GFI System's first foray into the world of modulation.

With a flexible dual-channel design allowing you to use two effects simultaneously in parallel (Mixtures), series (Cascade) or stereo (LR-Split), you can of course use any of the GFI System Synesthesia's 30 algorithms as standalone effects too.

With MIDI connectivity, 32 preset slots and other powerful modern features; the GFI System Synesthesia does more than simply embellish your core amp tones!

GFI System Synesthesia - A Dual Channel Modulation Masterpiece! - NAMM 2020

Here's what GFI System says about the Synesthesia Dual Channel Modulation Pedal:

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
  • Sample & Hold Flanger


  • Phaser
  • Envelope Phaser
  • Sample & Hold Phaser
  • Univibe


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


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

* To be added in future updates (est. March 2020).

Key Features

  • Dual‐engine multi‐modulation processor in a compact pedal
  • 32 presets
  • 30 algorithms
  • Flexible DSP Routing: Cascade, Mixtures and LR‐Split
  • Flexible Modes: Preset and Stompbox
  • Flexible Setup: Stereo Output or Pre/Post
  • Multi‐Purpose A.C.E jack accepts Aux Switches, Control Voltage (CV) or Expression Pedal
  • MIDI In and MIDI Thru
  • Works with SymmLab software for preset management, library update, firmware update and factory reset
  • Bright LEDs and LCD display


  • Input Impedance: 1 MOhm 
  • Output Impedance: 500 Ohm
  • DAC / ADC Resolution: 24 Bits
  • Current Consumption: ~240 mA
  • Weight: 0.8 Kg (1.6 lbs)
  • Dimensions: 12 (L) x 12 (W) x 5.5 (H) cm
  • Power Source: 9VDC (Negative Center)
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