Comparison

76477 Complex Sound Synth vs Hearing Space

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

Hearing Space

This experimental art application uses AI and machine vision to analyze images, inferring spatial depth and structure. It then transforms these spatial relationships into interactive soundscapes, allowing users to explore a non-human model of space through touch. The app treats your device as a perceptual instrument to reveal AI's internal logic.

Highlights
  • AI-based image analysis
  • Machine vision for spatial inference
  • Interactive sound generation
  • Touch-based sonic exploration
  • Perceptual instrument interface
  • Artistic and exploratory experience
Features
Read full description

Hearing Space-Time is an experimental art application that explores how artificial intelligence perceives space and transforms it into sound. Using machine vision, the app analyzes images to infer spatial depth and structure. These inferred spatial relationships are translated into sound, allowing users to interact with and listen to a non-human model of space. By touching different areas of an image, users activate sonic responses shaped by the machine’s interpretation rather than by visual representation alone. The app treats the mobile device as a perceptual instrument rather than a passive screen. Sound becomes a medium through which machine vision’s internal logic is revealed, inviting reflection on the relationship between human perception, algorithmic interpretation, and spatial understanding. Hearing Space-Time is designed as an artistic and exploratory experience. It does not aim to simulate reality, but to expose how artificial intelligence reconstructs and reorganizes the world through inference. AI-based image analysis using machine vision Interactive sound generation based on inferred spatial depth Touch-based exploration of image-derived sonic space A minimal, contemplative interface designed for artistic engagement

Screenshots

76477 Complex Sound Synth4 screens
Hearing Space4 screens

Verdict

The call

The clearest difference is price: Hearing Space at Free against 76477 Complex Sound Synth's $2.99. Hearing Space also leads on rating (5.0 vs 3.9) and update cadence (every 4 days vs every 3 months). 76477 Complex Sound Synth's advantage is ratings volume (9 vs 3) and iOS requirement (12.0 vs 15.0). On 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

CostPrice · In-app purchases · Ads · Monetization

Hearing Space is free to download; 76477 Complex Sound Synth costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Hearing Space holds the better App Store score, 5.0 against 3.9. Both are backed by a comparable volume of ratings — 9 and 3 respectively.

UpkeepUpdate frequency

76477 Complex Sound Synth ships an update every 3 months, Hearing Space every 4 days. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

Scorecard6 real differences · 4 level
76477 Complex Sound Synth versus Hearing Space: the parameters behind the verdict, then further details
Parameter76477 Complex Sound SynthHearing Space
Price$2.99Free — better
Rating3.9 (9 ratings)5.0 (3 ratings) — better
Positive reviews50.0% of reviews—
Number of ratings9 — better3
Update frequencyEvery 3 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size4 MB261 MB
Age rating4+4+
DeveloperBlack Cat SystemsJing Dong

Customer experience

76477 Complex Sound Synth

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

Hearing Space

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

76477 Complex Sound Synth

No in-app purchases

None

Hearing Space

No in-app purchases

Questions

Is 76477 Complex Sound Synth free?
76477 Complex Sound Synth costs $2.99, with no in-app purchases.
Is Hearing Space free?
Hearing Space is free to download, with no in-app purchases.
Which has better reviews, 76477 Complex Sound Synth or Hearing Space?
Hearing Space is rated higher. 76477 Complex Sound Synth averages 3.9 out of 5 from 9 ratings, while Hearing Space averages 5.0 from 3 ratings.
Do 76477 Complex Sound Synth or Hearing Space have ads?
Neither 76477 Complex Sound Synth nor Hearing Space shows ads.
Which is updated more often, 76477 Complex Sound Synth or Hearing Space?
76477 Complex Sound Synth ships an update every 3 months, and Hearing Space every 4 days. Most recently, 76477 Complex Sound Synth was updated on November 1, 2026 and Hearing Space on November 5, 2026.

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