Comparison

76477 Complex Sound Synth vs GSDSP MagicFusion

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

Head to head
About

76477 Complex Sound Synth

Create complex sound effects and music with a powerful synthesizer inspired by vintage hardware. Offers extensive modulation, noise generation, and customizable envelopes. Easily share your creations and control it with MIDI devices.

Highlights
  • Three oscillators with multiple wave types
  • Modulation capabilities for oscillators
  • Adjustable noise generator with filter
  • Configurable ADSR envelope
  • Unlimited sound effect generator boards
  • MIDI input support
  • Export/import sound effect boards
Features
Read full description

Synth 76477 is a powerful sound effects generator and synthesizer app, inspired by the famous SN76477 integrated circuit from the 1970s, but containing many enhancements. Features: • Three oscillators, each of which can produce a sine, triangle, sawtooth, or square wave • The outputs of two of the oscillators can be used to modulate the main oscillator • Frequency modulation can be linear or octave based • The duty cycle of the main oscillator can be adjusted in square wave mode • Noise generator, either analog or digital, with an adjustable low pass filter • Oscillator outputs can be mixed to the audio output • Fully configurable ADSR (Attack / Decay / Sustain / Release) envelope, linear or exponential • One shot mode available • Unlimited number of sound effect generator boards • User configurable array of sound effect generator buttons on each board, up to 50 on the iPhone and 150 on the iPad • Boards as well as individual generators can be exported and imported, and transferred to and from your computer via iTunes file sharing, making it easy to share with others Synth 76477 comes with a full set of sample sound generators, making it easy to understand how to use and configure them, and tap the full power of the app. Synth 76477 works with MIDI input devices (keyboards and controllers) in several interesting ways: If you plug a MIDI device into an iPad (via the USB Camera Connection Kit), Synth 76477 will automatically use it. You can plug several MIDI controllers in via a powered HUB, and Synth 76477 will use all of them. You can also use MIDI controllers over WiFi. Midi controllers can be used to trigger chip playback, or set the VCO frequency and volume. They can also be used in the chip editor to adjust the various settings. The app also supports Bluetooth audio devices. Visit the support page for step by step instructions on how to use the app: http://www.blackcatsystems.com/ipad/complex_sound_synthesizer_FAQ.html Buy your copy right now, and start generating your own sound effects in minutes.

About

GSDSP MagicFusion

This advanced audio effect plugin offers precise spectral fusion and multi-curve vocoding. It allows users to extract spectral characteristics from one audio source and apply them to another, enabling detailed transformations from subtle shading to extreme effects.

Highlights
  • Multi-curve spectral vocoding
  • Frequency-domain processing
  • Independent fusion amounts per frequency
  • Dynamic response control
  • Formant shifting
  • AUv3 audio effect plugin
Features
Read full description

The world’s first frequency-domain vocoder with multi-curve control and precision spectral fusion. Multi-Curve Spectral Vocoding MagicFusion is a multi-curve spectral vocoder workstation operating entirely in the frequency domain. Instead of relying on bandpass filters and envelope followers, it extracts the spectral characteristics of a modulator and applies them to a carrier, enabling precise, customizable vocoding across the entire spectrum. Apply independent fusion amounts per frequency or frequency range, then mix, modulate, and spread them to create anything from subtle vocal shading to extreme spectral transformations. Vocoder Signal Flow MagicFusion requires two audio inputs: the carrier (main input) and the modulator (sidechain). The plugin extracts the modulator’s spectral envelope and applies it to the carrier, creating a fused signal where both sources interact. This process provides clean, flexible control over the degree of spectral fusion and allows highly detailed shaping across the frequency spectrum. Dynamic Response & Formants Adjust the Smooth control to define how quickly the vocoder reacts, from fast, precise transitions to slower, more rounded movement. The Formant parameter shifts the spectral character of the modulator, while Detail adjusts the complexity of the filter response — from clean, intricate results to more organic, pumping behavior. MagicFusion 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

76477 Complex Sound Synth4 screens
GSDSP MagicFusion3 screens

Verdict

The call

The clearest difference is review sentiment: GSDSP MagicFusion at 100% against 76477 Complex Sound Synth's 50%. GSDSP MagicFusion also leads on rating (5.0 vs 4.0) and update cadence (every 5 weeks vs every 3 months). 76477 Complex Sound Synth's advantage is price ($2.99 vs $29.99). 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

76477 Complex Sound Synth costs $2.99 and GSDSP MagicFusion $29.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

GSDSP MagicFusion holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 10 and 4 respectively. Written reviews point the same way: 50% of 76477 Complex Sound Synth's written reviews are positive against 100% of GSDSP MagicFusion's.

UpkeepUpdate frequency

76477 Complex Sound Synth ships an update every 3 months, GSDSP MagicFusion every 5 weeks. The most recent releases landed on October 4, 2026 and September 22, 2026 respectively.

Scorecard4 real differences · 6 level
76477 Complex Sound Synth versus GSDSP MagicFusion: the parameters behind the verdict, then further details
Parameter76477 Complex Sound SynthGSDSP MagicFusion
Price$2.99 — better$29.99
Rating4.0 (10 ratings)5.0 (4 ratings) — better
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings10 — better4
Update frequencyEvery 3 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.012.0
Further details — not scored
Size4 MB68 MB
Age rating4+4+
DeveloperBlack Cat SystemsGustav Scholda

Customer experience

76477 Complex Sound Synth

All ratings10 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews10 reviews
Positive50.0%
Neutral30.0%
Negative20.0%

GSDSP MagicFusion

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

76477 Complex Sound Synth

No in-app purchases

None

GSDSP MagicFusion

No in-app purchases

Questions

Is 76477 Complex Sound Synth free?
76477 Complex Sound Synth costs $2.99, with no in-app purchases.
Is GSDSP MagicFusion free?
GSDSP MagicFusion costs $29.99, with no in-app purchases.
Which has better reviews, 76477 Complex Sound Synth or GSDSP MagicFusion?
GSDSP MagicFusion is rated higher. 76477 Complex Sound Synth averages 4.0 out of 5 from 10 ratings, while GSDSP MagicFusion averages 5.0 from 4 ratings.
Do 76477 Complex Sound Synth or GSDSP MagicFusion have ads?
Neither 76477 Complex Sound Synth nor GSDSP MagicFusion shows ads.
Which is updated more often, 76477 Complex Sound Synth or GSDSP MagicFusion?
76477 Complex Sound Synth ships an update every 3 months, and GSDSP MagicFusion every 5 weeks. Most recently, 76477 Complex Sound Synth was updated on October 4, 2026 and GSDSP MagicFusion on September 22, 2026.

Other comparisons