Comparison

GrainProc vs 76477 Complex Sound Synth

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

Head to head
About

GrainProc

Create unique sounds and musical textures in real-time by processing external audio. This app features two parallel granular engines for layering sounds, offering a versatile tool for musicians and sound designers.

Highlights
  • Real-time granular synthesis
  • Two parallel grain engines
  • AudioBus input support
  • Waveform sound source manipulation
  • Control over volume, feedback, and density
  • Visual level monitoring
Features
Read full description

GrainProc is a real-time granular synthesizer with which you can create new sounds and musical textures by affecting your voice, your instrument, or any input from AudioBus. 2 grain engines run in parallel, allowing you to layer two sounds and create rich textures, even as a solo performer! Features: • 2 Granular synthesizers running in parallel • Waveform representation of the sound allowing you to touch where you want the sound source to be • Sliders to control dry volume, wet volume, feedback level, and grain density • Visual level monitors of the dry, wet and feedback levels • Simple enough to be used with your feet! We discourage using your device with your feet, though it has been used that way for public performances!

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.

Screenshots

GrainProc4 screens
76477 Complex Sound Synth4 screens

Verdict

The call

The clearest difference is rating: GrainProc at 4.2 against 76477 Complex Sound Synth's 3.9. GrainProc also leads on review sentiment (60% vs 50%). 76477 Complex Sound Synth's advantage is iOS requirement (12.0 vs 16.0). On price, 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

GrainProc holds the better App Store score, 4.2 against 3.9. Both are backed by a comparable volume of ratings — 18 and 9 respectively. Written reviews point the same way: 60% of GrainProc's written reviews are positive against 50% of 76477 Complex Sound Synth's.

UpkeepUpdate frequency

GrainProc ships an update every 2 months, 76477 Complex Sound Synth every 3 months. Both last shipped on October 23, 2026.

Scorecard3 real differences · 7 level
GrainProc versus 76477 Complex Sound Synth: the parameters behind the verdict, then further details
ParameterGrainProc76477 Complex Sound Synth
Price$2.99$2.99
Rating4.2 (18 ratings) — better3.9 (9 ratings)
Positive reviews60.0% of reviews — better50.0% of reviews
Number of ratings18 — better9
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.012.0 — better
Further details — not scored
Size6 MB4 MB
Age rating4+4+
DeveloperMayank SanganeriaBlack Cat Systems

Customer experience

GrainProc

All ratings16 ratings
Positive75.0%
Neutral6.3%
Negative18.8%
Written reviews30 reviews
Positive60.0%
Neutral13.3%
Negative26.7%

76477 Complex Sound Synth

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

In-app purchases

None

GrainProc

No in-app purchases

None

76477 Complex Sound Synth

No in-app purchases

Questions

Is GrainProc free?
GrainProc costs $2.99, with no in-app purchases.
Is 76477 Complex Sound Synth free?
76477 Complex Sound Synth costs $2.99, with no in-app purchases.
Which has better reviews, GrainProc or 76477 Complex Sound Synth?
GrainProc is rated higher. GrainProc averages 4.2 out of 5 from 18 ratings, while 76477 Complex Sound Synth averages 3.9 from 9 ratings.
Do GrainProc or 76477 Complex Sound Synth have ads?
Neither GrainProc nor 76477 Complex Sound Synth shows ads.
Which is updated more often, GrainProc or 76477 Complex Sound Synth?
GrainProc ships an update every 2 months, and 76477 Complex Sound Synth every 3 months. Most recently, GrainProc was updated on October 23, 2026 and 76477 Complex Sound Synth on October 23, 2026.

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