Stereo Delay / Echo meets next-level Modulation.
The most mind-bending, modulated delay ever built.
AUv3 effect plugin for Logic Pro, AUM, Cubasis, GarageBand etc
A vintage-inspired delay supercharged with deep modulation, flexible filtering, and creative timing that pushes echoes into new dimensions.
Classic Delay, Reinvented
Quantum Delay takes the charm of a vintage stereo delay and fuses it with our next-level modulation system. Switch between the warm character of Tape mode and the pristine clarity of Fade mode, lock to BPM (including 5-tuplets) or dial in precise times in milliseconds. Use the Fine control for subtle push-and-pull micro-timing — or modulate your delay lines in ways traditional delays could only dream of.
Sculpted Echoes
Shape your repeats with switchable lowpass, highpass, and bandpass filters placed directly in the feedback path. Add modulation to create evolving tones, gentle movement, or drifting, frequency-shifting echoes. From warm analog-style rolls to shimmering, swirling textures, it’s all there.
Feedback with Precision
Control your delay tail behavior using either traditional % feedback or our modern dB-per-second decay system — ideal for predictable, musical decay even when the feedback path becomes complex. Enable Crossfeed for classic ping-pong stereo bounce, or push into Over-Feedback to create dense, self-building echoes that drift toward infinity.
Stereo or Dual Mono
Every section of Quantum Delay — delay, filter, and feedback — can switch between stereo and dual mono modes. Create tight, controlled stereo images or break them apart for wide, offset, unpredictable spaces. Dual mono modulation unlocks complex stereo interplay and beautifully asymmetric echoes.
Modulation Without Limits
Quantum Delay integrates our advanced modulation system, letting you modulate nearly anything: delay time, filters, feedback parameters, stereo controls, and more. Use LFOs, Random Generators, 2D modulators, Envelope Followers, Macros, and even chaotic systems to push your echoes far beyond traditional delay behavior. Or use our parameter randomisation feature to explore the plugin’s sound at random.
Quantum Delay is an AUv3 audio effect plugin compatible with Logic Pro, AUM, Cubasis, GarageBand and many more.
A Desktop version is also available for Windows and macOS (VST3 / AU / AAX).
More information here: https://gs-dsp.com/products
Thank you for this beautiful delay, I also own magic delay and have enjoyed using both in the same track on different instruments. Each have their own use and role . This was just does so much it’s incredible with the modulation . Keep them coming !
Developer Response
Thank you so much for your kind words. We love that you love it and this motivates us to keep on making and improving our effects! ❤️
Wowza
highlikeafly
these apps r totally insane. all of em. i know their cost runs a bit higher than most ios applications, but theyre most definitely worth every penny. sonic playgrounds. beautiful 👌
Developer Response
Thank you so much! It’s so great when we hear how much artists enjoy our work.
I Love this Delay so much, It’s on my Guitar Pedalboard for Live Playing!
Musikman4Christ
I'm totally blown away by this delay! I can't believe none of the YouTube reviews or tutorials were done using it as an Electric guitar effect. I like it so much that it is on my current electric guitar pedalboard now with ToneX dual amp setup. I love how it has tons of tweaking options including modulation! Seriously, I was so looking at the STRYMON timeline and even watching a lot of YouTube videos and wishing for something with a great Tape delay on IOS but that it was universal so I can use it on my iPhone with ToneX. Oh man, was I glad to find this gem!!! I couldn't believe the price of admission is only for the price of a cup of Starbucks coffee! You kidding me????? If anyone was ever on the fence on this amazing Tape delay app, well, you owe it to yourself to buy this gem! I am blown away at how awesome it is. And it works perfectly at 96khz resolution on my iPhone! It has all the regular favorites dotted 8th, etc, etc,, and modulation, oh man so much! And I love the GUI!!! It clicks with me right away! And that was in an iPhone 12 pro max! Unbelievable, I can stop smiling when playing it. I will use it live on my pedalboard at church worship next Sunday! Thank you Mr. Developer for creating such a wonderful delay app!!! My one request, is to have some settings show the parameter amounts. I'm not sure if it's already there as an option but that would be great when tweaking. Other than that, this gem is ready for Live action!!!I highly recommend this app!MM4C
- New: Custom LFO curves can now be saved and loaded across all GS DSP plugins
- New: Custom LFO wide view for more detailed editing
- New: User Manuals for each plugin, access them in the menu: Learn -> User Manual
- Improved stability with Logic Pro
- Fixed an issue where the initial random preset got marked dirty
- Quantum Delay: Added 40 new presets by Jakob Haq
- Quantum Delay/Granulator: Fixed an issue where some preset subcategories were duplicated
Version 2026.2
The developer, Gustav Scholda, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
