Comparison

GSDSP Quantum Delay vs Dub Filter

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

Head to head
About

GSDSP Quantum Delay

This app offers a vintage-inspired stereo delay effect with advanced modulation, flexible filtering, and precise timing controls. It allows users to sculpt unique echo textures, from warm analog sounds to complex, evolving soundscapes.

Highlights
  • Vintage-inspired stereo delay
  • Deep modulation system
  • Flexible filtering (LPF, HPF, BPF)
  • Precise timing controls (BPM, ms)
  • Switchable stereo/dual mono modes
  • Advanced modulation sources (LFO, Random, Envelope)
Features
Read full description

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

About

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.

Highlights
  • Vintage high-pass filter emulation
  • Eleven frequency steps
  • Adjustable resonance
  • Magnetism, Character, Dynamics, Artifacts controls
  • LFO modulation
  • Envelope Follower modulation
  • Standalone and AUv3 formats
Features
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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

GSDSP Quantum Delay3 screens
Dub Filter1 screens

Verdict

The call

The clearest difference is update cadence: GSDSP Quantum Delay at every 5 weeks against Dub Filter's every 15 months. Dub Filter's advantage is rating (5.0 vs 4.8). On price, review sentiment, ratings volume and ads 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 Delay costs $14.99 and Dub Filter $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Dub Filter holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 17 and 6 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

GSDSP Quantum Delay ships an update every 5 weeks, Dub Filter every 15 months. The most recent releases landed on September 22, 2026 and October 1, 2026 respectively.

Scorecard2 real differences · 8 level
GSDSP Quantum Delay versus Dub Filter: the parameters behind the verdict, then further details
ParameterGSDSP Quantum DelayDub Filter
Price$14.99$14.99
Rating4.8 (17 ratings)5.0 (6 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings17 — better6
Update frequencyEvery 5 weeks — betterEvery 15 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.012.0
Further details — not scored
Size94 MB21 MB
Age rating4+4+
DeveloperGustav ScholdaAudioThing Ltd.

Customer experience

GSDSP Quantum Delay

All ratings17 ratings
Positive94.1%
Neutral0.0%
Negative5.9%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Dub Filter

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

GSDSP Quantum Delay

No in-app purchases

None

Dub Filter

No in-app purchases

Questions

Is GSDSP Quantum Delay free?
GSDSP Quantum Delay costs $14.99, with no in-app purchases.
Is Dub Filter free?
Dub Filter costs $14.99, with no in-app purchases.
Which has better reviews, GSDSP Quantum Delay or Dub Filter?
Dub Filter is rated higher. GSDSP Quantum Delay averages 4.8 out of 5 from 17 ratings, while Dub Filter averages 5.0 from 6 ratings.
Do GSDSP Quantum Delay or Dub Filter have ads?
Neither GSDSP Quantum Delay nor Dub Filter shows ads.
Which is updated more often, GSDSP Quantum Delay or Dub Filter?
GSDSP Quantum Delay ships an update every 5 weeks, and Dub Filter every 15 months. Most recently, GSDSP Quantum Delay was updated on September 22, 2026 and Dub Filter on October 1, 2026.

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