ddtctmcc vs GSDSP Quantum Delay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ddtctmcc
This free music app translates touch gestures into MIDI Control Change messages. It offers a 2D touch area to control three MIDI values and two gesture recording modes: infinite looping or one-time playback triggered by buttons.
- 2D touch area for MIDI control
- X, Y, and Touch On/Off MIDI values
- Looping gesture recording
- One-time gesture playback
- Background operation
- AUv3 support
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ddtctmcc-ff "2D Touch Control To MIDI Control Change - For Free" This is a free compact version of "ddtctmcc" touch control app that is designed to work with touch gestures and output MIDI Control Change messages. This app is available as standalone version that can run in background and as an AUv3. It features: - 2D Touch Area where you can set 3 MIDI values (X, Y and Touch On / Off) that will be sent as MIDI CC messages - Two gesture recording modes: "Loop" and "Once": -- In "Loop" mode the gesture is immediately repeated infinitely. You can restart it and change the direction of gesture loop -- In "Once" mode the gesture is recorded silently and only played back later when "trigger" or "+pause" buttons are pressed.
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.
- 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)
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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
Screenshots
Verdict
The clearest difference is price: ddtctmcc at Free against GSDSP Quantum Delay's $14.99. ddtctmcc also leads on update cadence (daily vs every 5 weeks) and rating (5.0 vs 4.8). GSDSP Quantum Delay's advantage is review sentiment (100% vs 80%). On ratings volume, ads, in-app purchases and device support 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
ddtctmcc is free to download; GSDSP Quantum Delay costs $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ddtctmcc holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 7 and 17 respectively. Written reviews complicate that: 80% of ddtctmcc's written reviews are positive against 100% of GSDSP Quantum Delay's, so the app with the better star average is not the one people write more warmly about.
ddtctmcc ships an update daily, GSDSP Quantum Delay every 5 weeks. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.
| Parameter | ddtctmcc | GSDSP Quantum Delay |
|---|---|---|
| Price | Free — better | $14.99 |
| Rating | 5.0 (7 ratings) — better | 4.8 (17 ratings) |
| Positive reviews | 80.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 7 | 17 — better |
| Update frequency | Daily — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 6 MB | 94 MB |
| Age rating | 4+ | 4+ |
| Developer | Alexey Nadzharov | Gustav Scholda |
Customer experience
ddtctmcc
GSDSP Quantum Delay
In-app purchases
ddtctmcc
No in-app purchases
GSDSP Quantum Delay
No in-app purchases









