GSDSP Quantum Delay 4+

Delay with Feedback AUv3

Gustav Scholda

    • 5.0 • 7 Ratings
    • $4.99



Stereo Delay / Echo meets next-level Modulation.
The most mind-bending, modulated delay ever built.

AUv3 plugin compatible with Logic Pro, AUM, Cubasis, GarageBand.

Delay: Dive into the heart of time manipulation using either the retro Tape mode or the modern super-clean Fade mode. Seamlessly toggle between BPM synchronization, even 5-tuplets, or use any time in ms. Use the Fine control for pushing / dragging micro-timings or modulate your delay lines like never before.

Filter: Nested within the feedback path, switchable lowpass, highpass, and bandpass filters empower you to beautifully sculpt your echos. Easily add modulation for unique dynamic movement and depth.

Feedback: Define the intensity in conventional percent or our modern dB/s approach. Use crossfeed for classic ping pong delay style effects. Increase the intensity by using the over-feedback mode to build up your echos beyond infinity.

Each section can be toggled between stereo and dual mono for even more interesting stereo effects and control. Inject a burst of unpredictability using our parameter randomisation. And if that's not enough use our next-level modulation system to modulate pretty much everything using LFOs & Random Generators (also in 2D!), Envelope Followers, Macros and even dynamic chaotic systems.

Quantum Delay is an AUv3 audio effect plugin compatible with Logic Pro, AUM, Cubasis, GarageBand.
A Desktop version is also available for Windows and macOS (VST3 / AU / AAX).
More information here:

What’s New

Version 2024.1

- Input and Output Levels can be modulated (thanks Birdpie from Audiobus Forum)
- Added time division indicators to Delay knobs
- Added more GUI sizes (thanks Guillaume)
- Added a way to change the background brightness
- Improved background drawing
- Improved Compatibility with Logic Pro
- Fixed an issue when using Renoise as a host (thanks Franco)
- Fixed an issue when undoing choosing a modulator (thanks plexuss from KVR forum)

Ratings and Reviews

5.0 out of 5
7 Ratings

7 Ratings

hyperfocusmusic ,

Absolutely beautiful

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! ❤️

App Privacy

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


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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