Comparison

AUMI vs GSDSP MagicDelay

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

Head to head
About

AUMI

This app allows individuals with limited mobility to create music through movement and gestures. It focuses on improvisation and self-expression, making music accessible to a wider range of people, including those with profound physical disabilities.

Highlights
  • Music creation through movement and gestures
  • Focus on improvisation and self-expression
  • Accessible for individuals with profound physical disabilities
  • Uses device cameras for input
  • Configurable sound sensitivity
  • MIDI controller functionality
  • Import audio from other apps
Features
Read full description

Adaptive Use Musical Instruments (AUMI) software interface enables people who have very limited controlled (voluntary) movement to independently engage in music making. The Adaptive Use Musical Instruments software interface enables the user to play sounds and musical phrases through movement and gestures. This is an entry to improvisation rather than “hitting the right notes” or playing set pieces of music. Instead, the software uses music as a way for participants to express a range of affects, both by themselves and in response to, or in conversation with, others. While the AUMI interface can be used by anyone, the focus has been on working with people who have profound physical disabilities. In taking these participants as its starting point, the project attempts to make musical improvisation and collaboration accessible to the widest possible range of individuals. This approach also opens up the possibility of learning more about the relations between ability, the body, creativity and improvisation, from within a cultural context that does not always acknowledge or accept people with disabilities. This iOS version of AUMI runs on devices with cameras, and can run on iPhones, iPod touches, and iPads. A large assortment of sounds can be triggered with configurable amounts of sensitivity. AUMI also can be used as a MIDI controller to access other iOS based synthesizers or external equipment (using the iPad's Camera Connection kit or via Core MIDI over WiFi.) AUMI can also import audio from other iOS or desktop apps to be used as melodic or percussive instruments. AUMI can capture a record of the movement in the session, which can be exported and turned into reports in a clinical setting.

About

GSDSP MagicDelay

This app offers a unique spectral delay effect with advanced control over thousands of parallel delays using a single curve. It allows for real-time modulation, tempo-syncing, and precise feedback management for expansive sonic exploration.

Highlights
  • Spectral delay with single curve control
  • Tempo-synced grids and free-flowing motion
  • Real-time curve modulation and morphing
  • dB/s feedback decay system
  • Built-in highpass and lowpass filters
  • Crossfeed for stereo image expansion
  • Feedback Over for values beyond 100%
Features
Read full description

Do we need yet another Delay? Of course! We need thousands of delays working in parallel with full spectral control. One Curve. Infinite Delays. MagicDelay lets you control thousands of spectral delays with a single, elegant curve. Apply BPM-type grids to lock your shapes perfectly to the tempo, or let them flow freely for more experimental motion. With the powerful Curve Modifier, you can modulate, morph, and reshape your delay patterns in real time — turning one curve into endless rhythmic and spectral variations. Thoughtful Feedback control Control your delay tails using either traditional feedback in percent or our unique dB-per-second decay system — created specifically to manage the feedback of many varying delay times at once. Using dB/s ensures predictable, consistent tail lengths across the entire spectrum, even in the most complex settings. Sculpt the Spectrum Refine your delays with built-in highpass and lowpass filters, adding warmth, clarity, or sparkle exactly where needed. Activate Crossfeed to expand your stereo image and create immersive, wide-angle motion. And when things get wild, use Kill to instantly mute and clear the delay line — total control at any moment. Beyond 100% Need more? Push into new sonic territory with Feedback Over, allowing feedback values beyond the traditional 100% limit. From endless atmospheric swells to self-oscillating spectral chaos, MagicDelay gives you room to explore — and break — the rules. A New Dimension of Delay Whether you’re a musician, sound designer, or producer, MagicDelay is a spectral playground built for discovery. Its multi-curve design, deep modulation system, and flexible feedback architecture make it a truly expressive tool for shaping delays far beyond the ordinary. MagicDelay 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

AUMI4 screens
GSDSP MagicDelay3 screens

Verdict

The call

The clearest difference is price: AUMI at Free against GSDSP MagicDelay's $29.99. AUMI also leads on review sentiment (50% vs 25%) and rating (5.0 vs 4.7). GSDSP MagicDelay's advantage is update cadence (every 5 weeks vs every 6 months) and ratings volume (14 vs 4). On ads, in-app purchases, device support and iOS requirement 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

AUMI is free to download; GSDSP MagicDelay costs $29.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

AUMI holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 4 and 14 respectively. Written reviews point the same way: 50% of AUMI's written reviews are positive against 25% of GSDSP MagicDelay's.

UpkeepUpdate frequency

AUMI ships an update every 6 months, GSDSP MagicDelay every 5 weeks. The most recent releases landed on June 6, 2026 and September 22, 2026 respectively.

Scorecard6 real differences · 4 level
AUMI versus GSDSP MagicDelay: the parameters behind the verdict, then further details
ParameterAUMIGSDSP MagicDelay
PriceFree — better$29.99
Rating5.0 (4 ratings) — better4.7 (14 ratings)
Positive reviews50.0% of reviews — better25.0% of reviews
Number of ratings414 — better
Update frequencyEvery 6 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.412.0 — better
Further details — not scored
Size69 MB72 MB
Age rating4+4+
DeveloperRensselaer Polytechnic InstituteGustav Scholda

Customer experience

AUMI

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

GSDSP MagicDelay

All ratings14 ratings
Positive92.9%
Neutral0.0%
Negative7.1%
Written reviews4 reviews
Positive25.0%
Neutral25.0%
Negative50.0%

In-app purchases

None

AUMI

No in-app purchases

None

GSDSP MagicDelay

No in-app purchases

Questions

Is AUMI free?
AUMI is free to download, with no in-app purchases.
Is GSDSP MagicDelay free?
GSDSP MagicDelay costs $29.99, with no in-app purchases.
Which has better reviews, AUMI or GSDSP MagicDelay?
AUMI is rated higher. AUMI averages 5.0 out of 5 from 4 ratings, while GSDSP MagicDelay averages 4.7 from 14 ratings.
Do AUMI or GSDSP MagicDelay have ads?
Neither AUMI nor GSDSP MagicDelay shows ads.
Which is updated more often, AUMI or GSDSP MagicDelay?
AUMI ships an update every 6 months, and GSDSP MagicDelay every 5 weeks. Most recently, AUMI was updated on June 6, 2026 and GSDSP MagicDelay on September 22, 2026.

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