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GFI System Synesthesia Dual Channel Modulation Pedal

The Ultimate Multi-Mod Machine



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Product Description

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

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

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 'colourful' 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


  • 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)
Elliot Stent author picture

Written by Elliot Stent

Customer Reviews


3 reviews





Trusted Customer31st Oct 2020

Amazing product. Everything the reviews praise is true. Would completely recommend. And while you are at it, buy the Specular Tempus too. These just work so well with each other.

Value 5Looks 5Sound 5

Trusted Customer3rd Jul 2020

Excellent range of tones and functionality. Online editor is a must have for pedals with so many presets.

Value 4Looks 5Durability 5Sound 5

Mr Tony Mulcahy3rd Jul 2020

Amazing sounds. I've had loads of modulation effect, and this is better than anything else I have used. GFI are great with updates and the app really makes this pedal something special

Value 4Looks 4Durability 5Sound 5

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Andertons Music Company's Registered Office: 58-59 Woodbridge Road, Guildford, GU1 4RF. Andertons Music Company acts as a credit broker and not a lender and only offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance. Not all products offered by Secure Trust Bank PLC are regulated by the Financial Conduct Authority. Andertons Music Company is authorised and regulated by the Financial Conduct Authority, firm registration number 716155. Credit provided subject to age and status.