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PolyPipe by 4Pockets Audio (Released)
https://apps.apple.com/ph/app/polypipe/id6758938642
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.
Comments
This does look really good, Mac compatible too.
i’ve been on it for about 5 minutes and already love it. very fun
Strum mode sounds awesome. Will definitely be grabbing this.
The fact that it’s Mac compatible makes it a no brainer for me.
Been playing with it all day- running GRE, midi strummer, piano motifs thru it. Great arpeggiator.
Sending Scaler block chords through PolyPipe is really fun. It’s very easy to get started, and I’m really looking forward to seeing what it can do with with a deeper dive.
It’s kinda wild what it can do..
Tackles my genre really well.. uploaded a bunch of examples
I love this, especially paired with Progressions and a shitload of synths.
Interesting that it works on Mac but I’m guessing it’s auv3 only so won’t work in Ableton/bitwig etc?
You can use AUv3 (Audio Unit version 3) plugins in Ableton Live on macOS, starting from version 11.2
Yes but I think, if I remember right, midi AUv3s don't work, only instruments and effects
Ah, could be Gav, I’m on Windows, so I can’t use any of them.
yep, i can run it outside of abelton as its own app, but not inside abelton which is a bummer, but oh well, it’s still awesome
Well hopefully one day Ableton will pull their finger out on the MIDI side of things, I’m not even sure they know that there’sa difference between the instrument/effect plugins and the MIDI ones…
Looking forward to more video demos, at the moment YouTube is showing me lots of Polypipe Building Products. Handy for fixing that leaky pipe in the bathroom, but useless for sequencing synth apps.
It is annoying. However you can run some MIDI AU's in standalone, and then connect them to Live via a virtual IAC Driver. Not all 4Pockets provide the MIDI out options to do this though.
Cant you use ipad to bluetooth midi apps to abelton.
My midi generators are wired but this ipad also routes to another ipad ( as loads of controllers )
Having a screen for just sequencing feels like the best hardware sequencer lol.
@oldsynthguy lol… those plumbing results. I had to scroll awhile to find Paul’s video.
I really wanna make a video on how you can build complete tracks using the 4 lanes and the “templates” Paul provides for each ARP lane. It’s super easy, just remember you gotta feed it notes/chords/noise to get access to the gravy.
Highly recommend it, it’s a great arpeggiator.
What I mean about full track.. is that in lane 1 you can put a bass synth, and choose one of several bassline templates for that lane. The next lane you can drop a guitar synth and use one of the strumming templates for that lane, the templates are broken down into categories easy to navigate and populate.
In the “hull” video I posted above, that’s all PolyPipe with the exception of hammmerhead on drums. All of my recent uploads are of PolyPipe
Note the 4 ARP lanes selected at the top, and I was using the term "templates" but it's listed in the app as: patterns.
Thats cool.
Theres a few midi apps on my radar.
This is probably best.
Are you saying bluetooth wont be effective ?
Do the Arp lanes have midi channels ?
Iv actually just set up Poly 2 ( with 8 outs ) Plus a couple of Neons.
Will only sequence max 8 tracks.
So its quite easy to choose midi channels for everything via apps ( plus on a launchpads note keyboard ) via its hardware ( for overdub notes for any channels )
Does this app seem better split to different synths or blended lanes per synth ( or I guess works well enough on a project basis )
Would be cool to know if a couple of polypipe apps could replace poly2 and neons ( and other midi apps )
Yeah thanks, definitely getting this one, just have to hang on a bit as I've overspent this month!
@egobeats neat! So kinda like midioutting Battlestation but instead of random generative it’s more user control. Cool usecase!
Def more user control. I forgot to add try using Midi strummer, gre and running rythm thru it. I was pleasantly surprised. It can handle any genre of music I imagine. Very good stuff. Euclidean and Al of Paul's apps seem to play well with one another. When attaching it to piano motifs, my device gives up. lol. Fun stuff
I bought the app but initially I had no main presets or pattern presets. Deleted the app and reinstalled and the got the pattern presets to work, but still no main presets. Does anyone have any ideas on how to fix the issue or contact support.
It's good practice to open the standalone app first before opening the AUv3. If you didn't do that, it might be the cause of this problem
@Gavinski Thanks I actually did open the app first, so not sure what happened.
I’m not sure there are any main presets. At least, I’m not seeing any either.
I’m wondering if this would be useful in combination with EG Nodes. Have a generative node sending to PolyPipe and then PolyPipe sending to a synth. Might be a good opportunity to add some flare and expand generative capabilities for ambient soundscapes.
Would be curious to hear if anyone who has these apps has given that a try.
@LoopRabbit
Yeah, I feed generators through it and it's divine.
Midi Strummer, Shift Bud, Riffer, Riffler, SpaceWalk, etc... there's so many ways to use it. One of the first things I did was attach it to aGRE (drum generator) and loaded 4 instances of poison 202 percussion and chose the glitch/strum patterns on all 4 lanes and it was interesting. I prefer using generators as my midi keyboard is a hassle.
What’s your favorite generator? Like if I was going to spend money on just one for ambient sounds on my iPhone, what would you recommend?
I like AUtony a lot and I think it's only like 3 bucks.