GSDSP Quantum Distortion vs Dub Filter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GSDSP Quantum Distortion
Explore four distinct distortion effects—Saturation, BitCrush, Ring Modulation, and Downsampling—blended and controlled via an intuitive XY pad. Shape harmonics, reduce digital resolution, introduce inharmonic motion, and create classic digital degradation for unique audio textures.
- Four distortion algorithms (Saturation, BitCrush, Ring Modulation, Downsampling)
- Intuitive XY pad for blending effects
- Custom waveshaping saturation
- BitWarp for tonal variation
- Tunable oscillator for ring modulation
- Adjustable downsampling rate and jitter
- AUv3 audio effect plugin
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Four complementary distortion algorithms — Saturation, BitCrush, Ring Modulation, and Downsampling — blended and shaped through an intuitive XY pad. Saturation Shape harmonics using Quantum Distortion’s custom waveshaping saturation. Adjust Drive to set the intensity from subtle warmth to strong coloration, and use Asymmetry to introduce controlled even-harmonic emphasis of vintage tube characteristics. BitCrush Reduce digital resolution using BitCrush and reshape the crushed signal with BitWarp, which bends the quantization curve for additional tonal variation. This combination allows precise control over both the amount of reduction and the character of the resulting digital artifacts. Ring Modulation Introduce inharmonic motion using ring modulation, generated by multiplying the input with a tunable oscillator. Adjust frequency and amount in real time to create anything from light metallic shading to dense, shifting sidebands. Downsampling Lower the sample rate using Downsampling, reducing temporal resolution for classic digital degradation effects. Set the rate down to 200 Hz or introduce Jitter for controlled randomness, adding instability and movement to the downsampled signal. XY Pad Blending Navigate between the four distortion algorithms using the XY pad, allowing smooth transitions or static blends across the processing modes. The background updates to reflect the current region, providing clear visual feedback while exploring hybrid distortion shapes and interactions. Quantum Distortion 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
Dub Filter
This audio plugin emulates a legendary vintage high-pass filter, offering eleven frequency steps and controls for resonance, magnetism, character, dynamics, and artifacts. It includes LFO and Envelope Follower modulation sources for creative sound design.
- Vintage high-pass filter emulation
- Eleven frequency steps
- Adjustable resonance
- Magnetism, Character, Dynamics, Artifacts controls
- LFO modulation
- Envelope Follower modulation
- Standalone and AUv3 formats
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Dub Filter is a filter plugin modeled after King Tubby’s iconic Big Knob, a passive high-pass filter with eleven frequency steps from 70Hz to 7.5KHz. This filter defined the sound of the entire "roots" era of Jamaican music. On top of the main stepped Frequency knob and the Impedance (resonance), the filter also offers control over its behavior including Magnetism, Character, Dynamics, and Artefacts controls. We have also included two modulation sources, LFO and Envelope Follower, to enhance the creative possibilities of the plugin, from rhythmic pulsations to organic filter movements. Available as Standalone and AUv3.
Screenshots
Verdict
The clearest difference is update cadence: GSDSP Quantum Distortion at every 5 weeks against Dub Filter's every 15 months. On price, rating, review sentiment and ratings volume 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
GSDSP Quantum Distortion costs $14.99 and Dub Filter $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for GSDSP Quantum Distortion against 5.0 for Dub Filter. Both are backed by a comparable volume of ratings — 10 and 6 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
GSDSP Quantum Distortion ships an update every 5 weeks, Dub Filter every 15 months. The most recent releases landed on September 22, 2026 and September 14, 2026 respectively.
| Parameter | GSDSP Quantum Distortion | Dub Filter |
|---|---|---|
| Price | $14.99 | $14.99 |
| Rating | 5.0 (10 ratings) | 5.0 (6 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 10 — better | 6 |
| Update frequency | Every 5 weeks — better | Every 15 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 80 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Gustav Scholda | AudioThing Ltd. |
Customer experience
GSDSP Quantum Distortion
Dub Filter
In-app purchases
GSDSP Quantum Distortion
No in-app purchases
Dub Filter
No in-app purchases
Questions
Is GSDSP Quantum Distortion free?
Is Dub Filter free?
Which has better reviews, GSDSP Quantum Distortion or Dub Filter?
Do GSDSP Quantum Distortion or Dub Filter have ads?
Which is updated more often, GSDSP Quantum Distortion or Dub Filter?
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