Comparison

76477 Complex Sound Synth vs Combo Organ Model V

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

Combo Organ Model V

Experience the authentic sound of 60s transistor organs, famously used in psychedelic rock. This app offers a realistic sound engine with multiple instrument tones and built-in effects like reverb and vibrato. It's compatible with various audio routing technologies for seamless integration into your music production workflow.

Highlights
  • Realistic 60s transistor organ sound
  • Multiple instrument tones (Flute, Bright, Brass, Mellow)
  • Built-in spring reverb effect
  • Adjustable vibrato effect
  • Audiobus 3 & Audio Unit compatible
  • Core MIDI and MIDI over Bluetooth LE compatible
  • Scrollable and dual keyboard options
Features
Read full description

Combo Organ had a strong impact on rock, becoming a trademark sound of the psychedelic rock bands. You will be surprised at the real sound generated from this App and LIGHT YOUR FIRE! It has been featured on the following songs & albums, - "Lucy in the Sky with Diamonds” by The Beatles - "Light My Fire" by The Doors - "Born To Be Wild" by Steppenwolf - "House of The Rising Sun" by The Animals - "Good Vibrations" by The Beach Boys - "I’m A Believer" by The Monkees - "In-A-Gadda-Da-Vida" by Iron Butterfly - "Astronomy Domine" by Pink Floyd and much more.... - Optimized appearance on iPhone X, XR, XS/XS Max - Compatible with Audiobus 3 & Audio Unit - Core MIDI and MIDI over Bluetooth LE compatible - Supports Audiobus and Inter-App Audio (requires iOS 7 or later) - Scrollable Keyboard & dual Keyboards(Only iPad) with switchable key width - Pre-loaded with 4 instruments including FLUTE, BRIGHT, BRASS, MELLOW - BASS tone is assigned on lowest octave keys - Built-in Reverb that simulates a spring reverb - Vibrato that can adjust the rate and depth

Screenshots

76477 Complex Sound Synth4 screens
Combo Organ Model V4 screens

Verdict

The call

The clearest difference is rating: Combo Organ Model V at 4.4 against 76477 Complex Sound Synth's 3.9. 76477 Complex Sound Synth's advantage is price ($2.99 vs $3.99) and iOS requirement (12.0 vs 14.0). 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

CostPrice · In-app purchases · Ads · Monetization

76477 Complex Sound Synth costs $2.99 and Combo Organ Model V $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Combo Organ Model V holds the better App Store score, 4.4 against 3.9. Both are backed by a comparable volume of ratings — 9 and 18 respectively. Written reviews point the same way: 50% of 76477 Complex Sound Synth's written reviews are positive against 58% of Combo Organ Model V's.

UpkeepUpdate frequency

76477 Complex Sound Synth ships an update every 3 months, Combo Organ Model V every 4 months. Both last shipped on November 1, 2026.

Scorecard3 real differences · 7 level
76477 Complex Sound Synth versus Combo Organ Model V: the parameters behind the verdict, then further details
Parameter76477 Complex Sound SynthCombo Organ Model V
Price$2.99 — better$3.99
Rating3.9 (9 ratings)4.4 (18 ratings) — better
Positive reviews50.0% of reviews57.9% of reviews — better
Number of ratings918 — better
Update frequencyEvery 3 months — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better14.0
Further details — not scored
Size4 MB31 MB
Age rating4+4+
DeveloperBlack Cat Systemsinsideout ltd.

Customer experience

76477 Complex Sound Synth

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

Combo Organ Model V

All ratings19 ratings
Positive84.2%
Neutral5.3%
Negative10.5%
Written reviews19 reviews
Positive57.9%
Neutral15.8%
Negative26.3%

In-app purchases

None

76477 Complex Sound Synth

No in-app purchases

None

Combo Organ Model V

No in-app purchases

Questions

Is 76477 Complex Sound Synth free?
76477 Complex Sound Synth costs $2.99, with no in-app purchases.
Is Combo Organ Model V free?
Combo Organ Model V costs $3.99, with no in-app purchases.
Which has better reviews, 76477 Complex Sound Synth or Combo Organ Model V?
Combo Organ Model V is rated higher. 76477 Complex Sound Synth averages 3.9 out of 5 from 9 ratings, while Combo Organ Model V averages 4.4 from 18 ratings.
Do 76477 Complex Sound Synth or Combo Organ Model V have ads?
Neither 76477 Complex Sound Synth nor Combo Organ Model V shows ads.
Which is updated more often, 76477 Complex Sound Synth or Combo Organ Model V?
76477 Complex Sound Synth ships an update every 3 months, and Combo Organ Model V every 4 months. Most recently, 76477 Complex Sound Synth was updated on November 1, 2026 and Combo Organ Model V on November 1, 2026.

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