Comparison

GSDSP Quantum Filter vs JAX ONE XModulator Extended

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

GSDSP Quantum Filter

This audio effect plugin offers analog-modeled filters with flexible routing and dynamic modulation for creative sound design. It provides extensive control over tone shaping and complex filtering with various filter types and configurations.

Highlights
  • Analog-modelled filters
  • 11 filter modes
  • Series and parallel routing
  • Dynamic modulation support
  • Stereo and dual mono modes
  • MIDI control integration
Features
Read full description

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

About

JAX ONE XModulator Extended

This app offers a classic ring modulator effect with an analog-modeled unison oscillator for sound modulation and sonic refinement. It functions as a creative sound design tool and special effect processor with a unique 3D modular rack interface.

Highlights
  • Analog modeled ring modulator
  • Unison oscillator modulation source
  • Creative sound design tool
  • Special effect processor
  • 3D modular rack user interface
  • AUv3 app extension
Features
Read full description

The JAX ONE series is a new collection of analog modelled audio units (AUV3 app extensions), available on all Apople Silicon platforms and devices. JAX ONE XModulator Extended is a classic ring modulator effect with integration of an analog modelled unison oscillator as modulation source and some further extensions for sound modulation and sonic refinement. It can be used as a creative sound creation tool and special effect processor. It features a freely navigatable 3D user interface in the style of a modular rack synthesizer. A video demonstration is available at : https://youtu.be/Zxw67vlKowQ?si=khKl64aPgyNRW8sr The manual can be found here : https://audio.digitster.com/wp-content/uploads/2024/07/JAX-ONE-XModulator-Extended.pdf This build is truly 'universal', meaning, unit is available for: - MacOS (Silicon) - iOS (iPhone) - iPadOS (iPads) - visionOS (Apple Vision Pro) Please note, that AudioUnits (AUv3) require a supporting host application to perform.

Screenshots

GSDSP Quantum Filter3 screens
JAX ONE XModulator Extended4 screens

Verdict

The call

The clearest difference is review sentiment: GSDSP Quantum Filter at 100% against JAX ONE XModulator Extended's 50%. GSDSP Quantum Filter also leads on rating (5.0 vs 4.0) and iOS requirement (12.0 vs 14.0). JAX ONE XModulator Extended's advantage is update cadence (every 4 days vs every 5 weeks) and price ($12.99 vs $14.99). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

GSDSP Quantum Filter costs $14.99 and JAX ONE XModulator Extended $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

GSDSP Quantum Filter holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews point the same way: 100% of GSDSP Quantum Filter's written reviews are positive against 50% of JAX ONE XModulator Extended's.

UpkeepUpdate frequency

GSDSP Quantum Filter ships an update every 5 weeks, JAX ONE XModulator Extended every 4 days. The most recent releases landed on September 22, 2026 and September 15, 2026 respectively.

Scorecard5 real differences · 5 level
GSDSP Quantum Filter versus JAX ONE XModulator Extended: the parameters behind the verdict, then further details
ParameterGSDSP Quantum FilterJAX ONE XModulator Extended
Price$14.99$12.99 — better
Rating5.0 (3 ratings) — better4.0 (2 ratings)
Positive reviews100.0% of reviews — better50.0% of reviews
Number of ratings3 — better2
Update frequencyEvery 5 weeksEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better14.0
Further details — not scored
Size77 MB32 MB
Age rating4+4+
DeveloperGustav ScholdaJens Guell

Customer experience

GSDSP Quantum Filter

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

JAX ONE XModulator Extended

All ratings2 ratings
Positive50.0%
Neutral50.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

In-app purchases

None

GSDSP Quantum Filter

No in-app purchases

None

JAX ONE XModulator Extended

No in-app purchases

Questions

Is GSDSP Quantum Filter free?
GSDSP Quantum Filter costs $14.99, with no in-app purchases.
Is JAX ONE XModulator Extended free?
JAX ONE XModulator Extended costs $12.99, with no in-app purchases.
Which has better reviews, GSDSP Quantum Filter or JAX ONE XModulator Extended?
GSDSP Quantum Filter is rated higher. GSDSP Quantum Filter averages 5.0 out of 5 from 3 ratings, while JAX ONE XModulator Extended averages 4.0 from 2 ratings.
Do GSDSP Quantum Filter or JAX ONE XModulator Extended have ads?
Neither GSDSP Quantum Filter nor JAX ONE XModulator Extended shows ads.
Which is updated more often, GSDSP Quantum Filter or JAX ONE XModulator Extended?
GSDSP Quantum Filter ships an update every 5 weeks, and JAX ONE XModulator Extended every 4 days. Most recently, GSDSP Quantum Filter was updated on September 22, 2026 and JAX ONE XModulator Extended on September 15, 2026.

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