Surge XT
by Surge Synth Team
4.8 / 5     (23 votes)
Win32 Win64 OSX Linux
Surge XT is a subtractive hybrid synthesizer.

Each patch contain 2 scenes which are separate instances of the entire synthesis engine (except effects) that can be used to create layered or split patches. Quick category-based patch browser with textual search and favorites. 2779 patches, 614 wavetables.

  • 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).

Filter Block:
  • 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!

MSK.51.13 Feb 22 2024
(5 / 5)
Feb 22 2024
Do a favor to yourself and download it.
Jeff Bridges Sep 25 2023
(5 / 5)
Sep 25 2023
Such a great vst. I don't know how anyone couldn't like this. I use it a lot. And I just don't think there is much better out there for free.
Great, but please update this Jun 14 2023
(5 / 5)
Jun 14 2023
Amazing. Surge just keeps getting better and better.
Mahmoud Fassihi Jan 17 2023
(5 / 5)
Jan 17 2023
Thanks a lot, thank you very much for this useful program
Fresh spider2x0 Nov 08 2022
(5 / 5)
Nov 08 2022
Sounds beautiful
Eel Oct 18 2022
(5 / 5)
Oct 18 2022
Just get it. This is history. Amazing!
mokumhammer Oct 08 2022
(5 / 5)
Oct 08 2022
Love it - 5 star
John Burns Sep 19 2022
(4 / 5)
Sep 19 2022
I always found Surge to be a bit underwhelming. The interface is a bit complex for me and the tones are just so-so. I think the pads are where it shines, very big and complex. Meh. It's a good synth, not one that really does anything for me though. I don't have any real complaints about the design or anything.
Jared Aug 20 2022
(4 / 5)
Aug 20 2022
Amazing. So many presets! Must download. Sounds great
Proteus Aug 02 2022
(5 / 5)
Aug 02 2022
A Classic!
Digital Rules Mar 31 2022
(5 / 5)
Mar 31 2022
This Surge XT synth is a beast. Watch out! Awesome synth, no doubt. :) <3
me again Feb 10 2022
Feb 10 2022
Can anybody help me...we have 2 versions here... surge and surge xt...what is the diffrence between both synth... wich one should i download? thx!
Serty Feb 11 2022
Feb 11 2022
Surge XT is the new one with a lot of new features and more presets ;)
me again Feb 12 2022
Feb 12 2022
Thank you sir for answering me...that helped me!
Mpgmarkus Jan 24 2022
(5 / 5)
Jan 24 2022
Great synth for modern sounds, I use it very often. It's amazing, what you can do with it
velltone Jan 24 2022
Jan 24 2022
Vital and Surge are heavy weight fighters :)
PSY-LION Jan 23 2022
(5 / 5)
Jan 23 2022
Amazing Synth! Can be used anywhere! Can't believe it is free!
Codesound Jan 22 2022
(5 / 5)
Jan 22 2022
Amazing Linux synth.... I love and prefer projects like this which also develop for LINUX platform...... THANKS AGAIN
eb23 Jan 22 2022
(5 / 5)
Jan 22 2022
The best just got better, and easier to use. What they'll come up next?
Angry old man Jan 20 2022
(3 / 5)
Jan 20 2022
Excited to see this here (it's a great synth for sure), but quite disappointed that this is an .exe that will spit files all over my system. Why can't you provide the vst and files and let me "install" it by placing it in my organized VST folders? That would be the "open source" way of doing things.
N/A Jan 21 2022
Jan 21 2022
Or you can run the exe and move the file where you need it.. Like everyone else who owns a computer does.
Anonymous Jan 21 2022
Jan 21 2022
Check GitHub page:
andy Jan 21 2022
Jan 21 2022
I use dozens upon dozens of plugins, and when I move to a new computer I want to be able to just copy my VST folder across, not have to reinstall a hundred plugins from exe files.
Anonymous Jan 24 2022
Jan 24 2022
The VST3 version of the plug-in should be automatically installed in the default VST3 plug-in location and should be found by your host application. However, the Windows version also comes with a portable mode: Portable Mode allows you to store assets in the same directory as your Surge XT.vst3. If Surge XT.vst3 is installed in a folder and in that same folder there is a directory called SurgeXTData, Surge XT will use that for factory data rather than %PROGRAMDATA%Surge XT. If in that same folder there is a directory called SurgeUserData, Surge XT will use that for user data rather than %DOCUMENTS%Surge. Either none, one, or both of those folders can be there. Surge XT will fall back to the defaults if they are not present. You can always see your data paths in the About screen.
ShebenMuzik Jan 20 2022
(5 / 5)
Jan 20 2022
Simply the best ! You can make so many things just with this synth.
audioonlinux Jan 20 2022
(5 / 5)
Jan 20 2022
One of the best synth plugins for Linux, I recommend it, thank you very much XD