Creative MultiMode Filters
Analog modelled resonant Filters, flexible routing and next-level modulation!
AUv3 effect plugin for Logic Pro, AUM, Cubasis, GarageBand etc
Analog warmth meets flexible routing and dynamic modulation in a filter workstation built for creative sound design.
Analog-Modelled Filters
Quantum Filter uses resonant, analog-modelled filter designs that behave smoothly and musically across the entire spectrum. With no cramping, stepping, or digital artefacts, the filters remain stable even under rapid modulation. At high resonance settings they can reach self-oscillation, similar to classic hardware circuits.
Filter Types & Routing
Choose from 11 filter modes, including Lowpass, Highpass, Bandpass, Notch, Shelving options, Bell, and Ladder Lowpass in 1–4 pole configurations. Combine filters in series (up to three stages) or parallel (up to two), resulting in over 2,000 possible routing combinations for detailed tone shaping and complex layered filtering.
Built for Modulation
Designed to handle fast, artefact-free modulation, Quantum Filter responds cleanly even under rapid parameter changes. Its stability makes it suitable for dynamic environments, rhythmic modulation, or complex movement across multiple filter stages.
Stereo and Dual Mono
Switch between stereo and dual mono modes to shape the stereo image. In dual mono mode, left and right channels can move independently, enabling asymmetric movement, wider imaging, or separate modulation paths for each side.
MIDI Control
Quantum Filter integrates ADSR & AR modulators that respond directly to MIDI, allowing envelope-driven filter motion that behaves like a synthesizer’s filter section. This integration adds expressive control for rhythmic gating, animated sweeps, and dynamic shaping based on your playing or sequencing.
Quantum Filter 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
Love and i have bought nearly all your apps yet:For whatever reason for all bundles show a dramatically higher price than outright getting the apps separately soo, please fix 🙏
Developer Response
Thank you so much for the praise and support. We love that you love our apps. We have filed a ticket with Apple regarding the Bundle price issue and are waiting to hear back 🤞
- 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
