# PolyPipe — Harmony In Motion > Multi-lane polyphonic AUv3 sequencer plugin for generative and evolving musical patterns. (iPhone/iPad app by 4Pockets.com.) - Source: https://appshunter.io/ios/app/polypipe/id6758938642 (this page in markdown: same URL + `.md`) - Developer: [4Pockets.com](https://appshunter.io/developer/370131860) - Category: Music - Price: $14.99 - Rating: 4.60/5 from 10 App Store ratings · 8 written reviews indexed - Age rating: 4+ - Requires: iOS 13 · 31 MB - Languages: American English - Released: 2026-03-11 - Data updated: 2026-09-03 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/polypipe/id6758938642/reviews.md ## What is PolyPipe? PolyPipe is a multi-lane, polyphonic AUv3 sequencer plugin designed for creating evolving musical patterns rather than fixed, repetitive loops. Instead of thinking in terms of a single step sequence, PolyPipe lets you build multiple independent lanes, each with its own rhythm, pitch logic, octave behavior, probability, and modulation data — all running together as a coherent musical system. It comprises elements of some of my favourite sequencers of all time, all rolled into a single interface. At its core, PolyPipe takes incoming MIDI notes (or internally generated notes) and uses them as a musical “seed.” These notes are then processed through patterns, scales, transposition rules, and step logic to generate new musical phrases in real time. This makes it especially suited for generative music, complex arpeggiation, bass-and-chord splitting, and long-form evolving sequences. Each lane in PolyPipe is its own sequencer voice. A lane contains one or more patterns, and each pattern is made up of steps. Steps don’t just define when a note plays — they can also define how it plays. A step can include pitch offsets, velocity, gate length, strumming, probability, repeats (ratchets), ties for legato behavior, and even chord information. Patterns can be enabled or disabled independently, shifted by octaves, and combined with global transposition. Because lanes can have different lengths, directions, and step modes, the resulting sequences naturally phase against each other, creating variation without manual intervention. PolyPipe applies musical logic at the MIDI output stage rather than hard-coding notes upfront. Pitch values can be forced into a chosen scale and key, allowing even highly experimental patterns to stay musically coherent. Different step modes (such as forward, backward, ping-pong, random, chord, bass, or hybrid note/chord modes) let each lane behave differently, from traditional arpeggios to controlled chaos. PolyPipe Sequencer is built for musicians who want to explore ideas quickly, create unique patterns, and discover results they wouldn’t think to program manually. It rewards experimentation: small changes to probability, repeats, or step logic can dramatically alter the musical output while staying rhythmically locked and musically usable. PolyPipe Features ○ Multi-Lane Sequencer: with 4 independent lanes. ○ Pattern-Based Structure: where each lane contains multiple patterns. ○ Advanced Step Parameters: including pitch offset, velocity, gate length, auto-roll, repeats (ratchets), and legato ties. ○ Chord-Aware Steps: allowing steps to trigger chords, rotated voicing, or individual notes depending on lane mode. ○ Multiple Step Modes such as Up, Down, Ping-Pong, Random, Drunk, Chord, Bass, and hybrid note/chord modes. ○ Chord Strumming: allowing guitar like strumming patterns. ○ Polyrhythmic Playback: through lanes and patterns of differing lengths and directions. ○ Probabilistic Sequencing: with per-step chance and variable repeat behavior for evolving patterns. ○ Octave Transposition Control: per pattern and globally for rapid harmonic variation. ○ MIDI CC Sequencing: allowing lanes to output modulation data. ○ Real-Time MIDI Interaction: where incoming notes influence pitch selection, chords, and playback behavior. ○ Live-Safe Parameter Editing: with immediate feedback and no need to stop playback. ○ Generative-Focused Design: optimized for long-form evolving sequences rather than static loops. ○ Long Patterns: up to 32 steps in length, chain-able up to 128 steps. ○ 4 MIDI Output Ports: allowing each of the 4 phase-locked arpeggiators to be routed to a different instrument. ○ Global Swing: allowing 8th- and 16th-note swing across all 4 arpeggiators. ○ Rhythm Generator: creates rhythmic patterns that are none chord/scale specific. ## Key features - Multi-lane sequencer with 4 independent lanes - Pattern-based structure with multiple patterns per lane - Advanced step parameters (pitch, velocity, gate, probability) - Chord-aware steps and chord strumming - Multiple step modes (random, chord, bass, hybrid) - Polyrhythmic playback with differing lane/pattern lengths - Probabilistic sequencing with per-step chance ## Recent user reviews (8 of 8) All indexed reviews: https://appshunter.io/ios/app/polypipe/id6758938642/reviews.md ### 5/5 — Bingo *2026-05-09* Finally, it was about time I had a sequencer that does everything—it's fantastic! But after all the other sequencers I bought before, I kept thinking, "Why don't they make a sequencer that does everything?" And here it is at last, after all these years! ### 1/5 — user interface makes me want to smash things *2026-04-27* one of those apps that is so horribly obtuse that by the time you figure it out your inspiration has been lost and you forget your idea. then when you come back to it a week later you discover you’ve forgotten how it works and have to relearn it and wish you’d never seen it. Oh, and by the way, don’t even THINK of pressing the button with the circle icon (it says MIDI THRU when you press it), because once you do the app stops working and you have to reload it to get it working again. Why? No idea. ### 1/5 — 12 hrs. AFTER I buy it for $20 Cdn. The $ is cut IN HALF??? *2026-04-10* There were nothing set up for us not knowing about the sale, IN A FEW HOURS?? 😱 ### 5/5 — Very good! *2026-04-07* A quite extraordinary arpeggiator that goes beyond the usual. It can be simplistic if that’s what you’re after, but can be really deep too. The drum editor/ arpeggiator is fantastic and makes this even more of a great app. Controlling four lanes of connected music apps, plus drums, or however you want to connect it up, makes for some seriously good rhythms. After watching the very informative YouTube videos, plus the manual, it’s fairly easy to get the idea and be surprised with the results. I really like it! P.S. the randomisation options are superb! ### 5/5 — Pretty Incredible Arpeggiator/ Sequencer *2026-03-28* If you are looking for a proper sequencer, this will suffice- but it’s much more a super arpeggiator. Absolutely stunning app ### 5/5 — Fantastic! *2026-03-27* So much more than an “arp app”. Opens up so many possibilities to get creative. Love the auto roll/randomize features for generating ideas. Lovely midi tool! ### 5/5 — An exceptional arpeggiator *2026-03-18* This 4 lane arpeggiator / performance sequencer is incredibly flexible, and heaps of fun. Terrific chord modes, strumming, and ratcheting. Great randomisation options. A performance oriented UI with little need for menu diving. A great iOS MIDI app. ### 5/5 — Where are the presets *2026-03-14* Love the app but I have no factory presets folder is empty,building a lot of my own but I have them coming I’d like to have them **Developer response:** You're most likely looking in the wrong place. It comes with lots of patterns which are what you need to load into each of the ARPs. Presets are a way for you to save your own sessions and not 'presets' in the conventional sense. Think of them as your finished songs, or what your DAW would save. It's like a backup of your song. ## Frequently asked questions about PolyPipe ### What is PolyPipe? PolyPipe is a multi-lane, polyphonic AUv3 sequencer plugin designed for creating evolving musical patterns. It allows you to build multiple independent lanes, each with its own rhythm, pitch logic, and modulation data, to generate complex musical sequences in real-time. ### How does PolyPipe create musical patterns? PolyPipe takes incoming MIDI notes or internally generated notes as a "seed." These are then processed through patterns, scales, transposition rules, and step logic to generate new musical phrases. Each lane can have different lengths, directions, and step modes, creating natural phasing and variation. ### What kind of musical logic does PolyPipe use? PolyPipe applies musical logic at the MIDI output stage. Pitch values can be forced into a chosen scale and key, ensuring musical coherence even with experimental patterns. Different step modes allow each lane to behave uniquely, from traditional arpeggios to controlled chaos. ### What are the advanced step parameters in PolyPipe? Steps in PolyPipe can define pitch offsets, velocity, gate length, strumming, probability, repeats (ratchets), ties for legato behavior, and even chord information. This allows for highly detailed control over how each note or chord is played. ### Does PolyPipe support chords? Yes, PolyPipe features chord-aware steps, allowing steps to trigger chords, rotated voicings, or individual notes depending on the lane mode. It also includes chord strumming for guitar-like patterns. ### Is PolyPipe suitable for generative music? Absolutely. PolyPipe is especially suited for generative music due to its ability to create evolving sequences and its probabilistic sequencing features. Small changes to probability or step logic can dramatically alter the musical output while staying rhythmically locked. ### What devices does PolyPipe support? PolyPipe is supported on iPhone, iPad, and iPod. It functions as an AUv3 plugin, meaning it requires a compatible host application on these devices. ### How much does PolyPipe cost? PolyPipe is a paid application priced at $14.99. There are no in-app purchases or subscriptions mentioned for this application. ## Version history (last 2 releases) ### 1.01 — 2026-03-27 1.01 B41 Added a new Drum Editor which works alongside the 4 ARPs. Create drum patterns up to 64 beats (4 bars) in length for each drum pattern. Added a condiguration so you can choose GM Midi, DigiStix or define your own mappings. Added a Drums folder to the pattern manager and added a few drum preset patterns. Added a Drums option to the MIDI shortcuts and added AU params to enable DRUM patterns and enable lane. Added a Drum Mixer allowing you to mix drums without having to deal with the configuration Drum Setup window. Fixed an issue where scrolling menus (in the Pattern Rhythm Generator) caused a crash in some cases. Fixed an issue where CC editing was showing the wrong popup name and not changing in the prompt. Added a Pattern Rhythm Generator for the Drums lane. Updated the manual with new screen shots and a short Drum Editor section. Changed the Rhythm Generator windows to reference patterns A-D and not #1-#4. Updated the help file with video links for the MasterClass videos. ### 1.0 — 2026-03-11 No release notes. ## More apps by 4Pockets.com - [Meteor Multitrack Recorder](https://appshunter.io/ios/app/meteor-multitrack-recorder/id417726727) - [Tone Generator Ultra](https://appshunter.io/ios/app/tone-generator-ultra/id514273546) - [PocketRTA Ultra](https://appshunter.io/ios/app/pocketrta-ultra/id514903914) - [StompBox Band](https://appshunter.io/ios/app/stompbox-band/id845046209) - [Audio Toolbox](https://appshunter.io/ios/app/audio-toolbox/id1353387223) - [Audio Compressor AUv3 Plugin](https://appshunter.io/ios/app/audio-compressor-auv3-plugin/id1426387457) All apps by 4Pockets.com: https://appshunter.io/developer/370131860 ## Related topics [polypipe](https://appshunter.io/ios/topics/polypipe) --- *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 2026-09-03.*