Skip to product information
1 of 2

Surge XT

Surge - XT

Surge - XT

Download Plugin

Surge-XT Download  

A Sound Designers Dream

Featuring many synthesis techniques, a great selection of filters, a flexible modulation engine, a smorgasbord of effects, and modern features like MPE and microtuning.


  • 3 oscillators per scene, with 12 versatile oscillator algorithms: Classic, Modern, Wavetable, Window, Sine, FM2, FM3, String, Twist, Alias, S&H Noise and Audio Input.
  • Classic oscillator is a morphable pulse/saw/dual saw oscillator with a sub-oscillator and hard sync.
  • Modern oscillator is a mixable saw/pulse/triangle oscillator with an optional sub-oscillator mode for triangle (which can also change to sine or square) and hard sync.
  • FM2/FM3 oscillators consist of a carrier and 2 or 3 modulators and various options.
  • String oscillator uses two filtered waveguides to emulate plucked or bowed string sounds.
  • Twist oscillator is based on a very famous Eurorack macro oscillator, and it offers a myriad of synthesis options in a very simple and quick way.
  • Most algorithms (except FM2, FM3, Twist and Audio Input) offer up to 16-voice unison at the oscillator level.
  • Oscillator FM in 3 different configurations and ring modulation between oscillators 1-2 and 2-3.
  • Most oscillator algorithms (except FM2, FM3, Sine and Alias) are strictly band-limited, yet still cover the entire audible spectrum, delivering a clear, punchy and clean sound.
  • Noise generator with variable spectrum (available directly in the oscillator mixer).


  • Two filter units in 8 different configurations.
  • Feedback loop available in 7 of those configurations.
  • Available filter algorithms: Lowpass (12 and 24 dB/oct, each with 3 variations), Legacy Ladder Lowpass (6-24 dB/oct), Vintage Ladder Lowpass (2 variations, each with and without gain compensation), Highpass (12 and 24 dB/oct, each with 3 variations), Bandpass (12 and 24 dB/oct, each with 3 variations), Notch (12 and 24 dB/oct, each with 2 variations), Allpass (3 variations), Comb (positive and negative), S&H.
  • Open-source additions to our filter algorithms include: K35 and Diode Ladder filter types from Odin 2 synthesizer, 12 and 24 dB/oct multimode filters from OB-Xd, and weird but fascinating Cutoff Warp, Resonance Warp and Tri-Pole filters by Jatin Chowdhury!
  • Filters can self-oscillate (with excitation) and respond amazingly fast to cutoff frequency changes.
  • Waveshaper (43 shapes).


  • 12 LFO units available, 6 are per voice and 6 are global for the whole scene.
  • DAHDSR envelope generators on every LFO.
  • LFO shapes consist of 7 deformable LFO waveforms, step sequencer, a fully-fledged multi-segment envelope generator (MSEG) with various curves and up to 128 nodes, and last but not the least - a formula modulator which utilizes Lua scripting language to provide completely custom modulator output.
  • Voice LFOs allow envelope retriggering in step sequencer mode.
  • Extremely fast and flexible modulation routing. Almost every continuous parameter can be modulated!


16 effect units arranged as 4 inserts per scene, 4 sends and 4 master effects.

27 effect algorithms:


  • 3-band fully parametric EQ
  • 11-band graphic EQ
  • Exciter
  • Resonator


  • CHOW
  • Distortion
  • Neuron
  • Tape
  • Waveshaper


  • Combulator
  • Frequency Shifter
  • Nimbus
  • Ring Modulator
  • Treemonster
  • Vocoder


  • Chorus
  • Ensemble
  • Flanger
  • Phaser
  • Rotary Speaker


  • Delay
  • Reverb 1
  • Reverb 2
  • Spring Reverb


  • Airwindows (itself containing 56 effects!)
  • Conditioner
  • Mid-Side Tool

Synth Features

  • 4 aliasing free Operators with classic TX waveforms
  • 12 voices
  • Drag-and-drop envelopes
  • 8 classic FM algorithms with feedback on operator D
  • Resonant filter with 24db/oct lowpass, highpass and bandpass
  • Visualization of the resulting waveform for immediate editing response
  • LFO syncable to host
  • Runs on Windows (VST 2 and VST3) and Mac (AU, VST2 and VST3), 64 bit only 

Surge XT Plugin System Requirements

  • Minimum: Windows 7 and Intel or AMD processor featuring SSE2 instructions
  • Recommended: 64-bit Windows 7 or newer, 3 GHz quad-core processor featuring SSE2 instructions or better
  • Minimum of 4 GB of RAM
  • VST3 or CLAP compatible host application
  • x64-compatible CPU, OS and host is required to use the 64-bit version


  • Surge XT is an Intel/Apple Silicon universal binary. Intel Mac requires macOS 10.11 or later, Apple Silicon Mac will run Surge XT with any Apple Silicon version of macOS
  • Minimum of 4 GB of RAM
  • VST3, AU or CLAP compatible host application


  • PC or ARM system running a Linux distribution
  • x64-compatible CPU, OS and host is required to use the 64-bit version; for ARM processors you can build Surge XT for ARM on Raspberry Pi and similar (tested with RPi4/arm64)
  • Minimum of 4 GB of RAM
  • VST3, CLAP or LV2 compatible host application
View full details