76477 Complex Sound Synth vs ThermoSynth
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
ThermoSynth
This app is a generative synthesizer that creates evolving sonic structures inspired by thermodynamic systems. It features a self-regulating hyper oscillator engine with a feedback matrix and stochastic modulators for unique, never-repeating drone synthesis and organic textures.
- Self-regulating hyper oscillator engine
- Generative synthesis at waveform level
- 4x4 feedback matrix for oscillator interaction
- Stochastic modulators for sonic changes
- User-controlled injections for system perturbation
- MPE support
- High-resolution rotary encoder MIDI mapping
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Welcome to the politics of sound ! ThermoSynth is a self regulating hyper oscillator engine inspired by thermodynamic systems. ThermoSynth extends the classical oscillator concept, it is a generative synthesizer at the waveform level, which does not express only static / interference waveforms but also an evolution of a sonic structure by internal communication and its actions inside certain controllable margins. The oscillator of ThermoSynth establishes its own engine environment and begin its signal path with a waveform generator ( pure mathematical, not samples nor optimized tables ) rendering basic waveforms and capable of morphing in between. The 4 oscillators of the Thermo are in continuous interaction sending each other their signals thanks to a 4X4 feedback matrix. Many type of changes in this system are introduced by the stochastic modulators which sonicLAB is known for and also by the user through some perturbations called the injections into the system. Each oscillator engine continuously checks its environment conditions and takes decisions, “self regulates”, in reaction to these changes applied. The result is unique never ending and never repeating drone synthesis, pure organic textures for electronic music; and hours can easily pass with experimenting on ThermoSynth. Detailed app description can be found at https://www.sonic-lab.com/thermo/ And you can download the manual here : https://www.sonic-lab.com/Thermo/Thermo-iOS_manual.pdf ThermoSynth is identical to the desktop sonicLAB Thermo version. For external control, it comes with MPE support and sonicLAB high resolution rotary encoder midi mapping feature as on the desktop version.
Screenshots
Verdict
The clearest difference is price: 76477 Complex Sound Synth at $2.99 against ThermoSynth's $34.99. 76477 Complex Sound Synth also leads on device support (3 vs 1). ThermoSynth's advantage is rating (5.0 vs 3.9) and iOS requirement (9.3 vs 12.0). On review sentiment, ratings volume, update cadence 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
76477 Complex Sound Synth costs $2.99 and ThermoSynth $34.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ThermoSynth holds the better App Store score, 5.0 against 3.9. Both are backed by a comparable volume of ratings — 9 and 4 respectively. Written reviews split almost evenly too, at 50% and 50% positive.
76477 Complex Sound Synth ships an update every 3 months, ThermoSynth every 2 months. The most recent releases landed on October 21, 2026 and October 6, 2026 respectively.
| Parameter | 76477 Complex Sound Synth | ThermoSynth |
|---|---|---|
| Price | $2.99 — better | $34.99 |
| Rating | 3.9 (9 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| Number of ratings | 9 — better | 4 |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod — better | iPad |
| Requires iOS | 12.0 | 9.3 — better |
| Further details — not scored | ||
| Size | 4 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Black Cat Systems | SonicPlanet Audio Video Teknolojileri Anonim Sti. |
Customer experience
76477 Complex Sound Synth
ThermoSynth
In-app purchases
76477 Complex Sound Synth
No in-app purchases
ThermoSynth
No in-app purchases
Questions
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Is ThermoSynth free?
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