# Circuit Piano: Sound Puzzles — Tune synths & pedals by ear > Tune synths & pedals by ear (iPhone/iPad app by FreshBizOpps, LLC.) - Source: https://appshunter.io/ios/app/circuit-piano-sound-puzzles/id6787467633 (this page in markdown: same URL + `.md`) - Developer: [FreshBizOpps, LLC](https://appshunter.io/developer/1506039373) - Category: Games, Music, Music, Puzzle - Price: Free (on sale, was $9.99) - Age rating: 4+ - Requires: iOS 26.0 · 19 MB - Languages: American English - Released: 2026-09-02 - Data updated: 2026-09-13 - User reviews in markdown: https://appshunter.io/ios/app/circuit-piano-sound-puzzles/id6787467633/reviews.md ## What is Circuit Piano? Hear the target. Move the faders. Match the sound before time runs out. Circuit Piano turns real analog circuits into sound puzzles and playable instruments. START FREE 128 circuits across every difficulty level, four live scope channels, every control, keyboard and sequencer, and MIDI keyboard input. Play offline without ads or an account. EVERY CHALLENGE IS AN INVITATION Open any shared eight-character code and play the same circuit with the same clock and scope, free. Send your score back and keep the challenge going. CIRCUIT PIANO COMPLETE One optional, permanent in-app purchase unlocks unrestricted access to all 1,024 circuits and all 32 scope channels. No subscription. Every circuit includes sixteen certified puzzles, different component builds, and multiple starting settings. Already paid for Circuit Piano or its permanent unlock? Everything stays included. Restore purchases with the same Apple Account. Designed for headphones. Made for listening. ## Chart rankings - #114 in Top Free · Music (US App Store) ## Version history (last 4 releases) ### 1.4 — 2026-09-12 Discover the sound behind every circuit. • Browse all 32 scope channels in a new visual gallery. • Pin favorite circuit codes and return to them whenever you like. • Feel each match lock in, watch points bank into your run, and see level advances more clearly. • Discover GOAL, fine adjustment, the keyboard and sequencer with clearer controls and contextual cues. • Share richer challenges and return a friend's score even after moving to another circuit. Start with 128 free circuits and four scope channels. Every control, MIDI, keyboard and sequencer is included. Any exact shared or entered code plays free. Circuit Piano Complete unlocks all 1,024 circuits and 32 channels with one permanent purchase. Existing paid owners keep everything. ### 1.2 — 2026-09-10 Clearer, more responsive scope visuals across all 32 channels. Improved layouts on iPhone and iPad, including rotation and larger text. More consistent control adjustments and clearer guidance as you play. Refined puzzle pacing and transitions throughout your run. ### 1.1 — 2026-09-05 The bench grows up. • THE RUN CLIMBS: tune eight circuits within the clock and the run rises a level — eight levels, and the bench's colour tells you which one you're on before a fader moves. • SIXTEEN BUILDS OF EVERY CIRCUIT: each code picks a build with every part inside its real tolerance, so the same circuit never sounds quite the same twice. • EIGHT CERTIFIED STARTS per puzzle, so a replay is a new sitting. • NEW CHIPS: OTAs, voltage-controlled filters, bucket-brigade echoes, CMOS fuzz, ring modulators, envelope followers, an LFO, sub-octave dividers and a VCO — hundreds of circuits redesigned so every one sounds like itself. • APPLE PENCIL on iPad: tilt for fine control, pressure on the keys and pads, Pencil Pro haptics. • A NEW ICON, and every board now carries its own silkscreen stamp on the underside — flip it and look. • The score, the clock and the picker retuned end to end; hundreds of fixes. ### 1.0 — 2026-09-03 No release notes. ## More apps by FreshBizOpps, LLC - [Breadpad - SPICE Simulator](https://appshunter.io/ios/app/breadpad-spice-simulator/id6443904179) - [Power Grid Map](https://appshunter.io/ios/app/power-grid-map/id6740839186) - [Snap & Peel - Die Cut Stickers](https://appshunter.io/ios/app/snap-and-peel-die-cut-stickers/id6743980277) All apps by FreshBizOpps, LLC: https://appshunter.io/developer/1506039373 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-13.*