GENERATIVE MIDI SEQUENCER · iOS
A generative MIDI brain for your synths, drum machines & modular.
Sequentia generates basslines, drums, chords, arps and modulation, all in key and in time, then streams them straight to your hardware. New in 2.0: it makes sound on its own too, so you can start with nothing but the phone.
OFFLINE
100%
No cloud, no AI. Local algorithm.
DETERMINISTIC
1 seed
Same seed, same pattern. Every time.
CURATED GROOVES
1,112
Hand-picked drum grooves across 19 styles.
MODULES
13
Stack them freely into one live rack.
NEW IN 2.0
New in 2.0. It makes sound on its own.
Sequentia used to be silent without gear plugged in. Now every module has a voice and plays straight through the phone. Press play and you hear the pattern. The sound is free, it is not behind the paywall.
87 sounds
12 acid voices on a real 303-style emulation, 67 polyphonic presets and 8 drum kits. Acid, bass, keys, plucks, pads, leads, organs, bells and more.
Chosen by ear
Sounds switch live while the pattern plays, so you pick by listening instead of by reading names. A speaker button turns each module’s sound on and off.
Never two of the same
Every module opens on a sound that suits what it writes, so a rack of six does not come out sounding like one instrument stacked six times.
Your gear still comes first
Plug in a MIDI device and the phone sound steps aside. It never doubles your synth.
HOW IT WORKS
Connect your gear. Press play. Let the algorithm play for you.
STEP 01
Connect
Plug in any synth, drum machine or modular rig over USB-C, Bluetooth MIDI or Wi-Fi. Sequentia is hot-plug aware and rescans on the fly.
STEP 02
Build a rack
Stack modules freely and route each one to its own device and MIDI channel. One global tempo, key and transport keeps everything locked together.
STEP 03
Play & evolve
Generate parts, turn on Mutate to keep them evolving, and reshape the rack live by adding, removing or editing any module while everything keeps playing.
THIRTEEN MODULES
One rack. Every part you need to play live.
Each module generates a different musical part in key and in time, routed to its own device. Add only the ones your set needs.
01
Acid
A 303-style bassline with slide and accent. The slides really bend pitch, on your gear and in the exported file.
02
Bass
Generative bass in 16 genre styles, from acid and techno through EBM to upright, with a step editor when you want to take over.
03
Drums
Eight lanes, 1,112 grooves across 19 styles, each with its own swing.
04
Chords
Diatonic progressions in your project key, from a library of 417. Hold them as pads or feed them to an Arp.
05
Arp
Arpeggiates a chord, on its own or following a Chords module.
06
Stabs
Chord hits, from skank to rave. Twelve styles plus Random, with a preset library.
07
Piano
Draw a melody by hand, or let it write one in a genre you pick.
08
Euclid
Three euclidean rings at their own lengths, drifting apart and landing together.
09
Rain
Generative note drops, from a drizzle to a downpour.
10
Live Performer
One pad that plays the whole rack.
11
CC Control
Your synth’s own knobs, on the phone, with a looper for knob movement.
12
Mod
LFOs that sweep a CC on your synth. No notes, just movement.
13
Mixer
Solo, mute and level for any module while it plays.
GENERATIVE, NOT RANDOM
Tap Random for a new part. Turn on Mutate and it keeps evolving.
Every part is generated in key and in time. Generation is local, algorithmic and deterministic from a seed, so the same seed gives the same pattern, fully offline. No internet, no AI model, no cloud.
Mutate intensity 1 to 4, every N loops
Fully reversible, so the original part comes back untouched
BUILT FOR A MULTI-DEVICE RIG
Route every part to its own gear and never stop playback.
Add, remove or edit any module while the rest keep playing. Per-module MIDI output with no forced defaults, plus clock and transport to every connected device.
USB-C, Bluetooth MIDI and Wi-Fi (RTP-MIDI)
MIDI Clock (24 PPQ) with start / stop to every device
Background playback with Lock Screen and Dynamic Island controls
Send to DAW and per-module .mid export
LOVED BY MUSICIANS
What players are saying
“Unique and very inspiring balance between manual and generative sequencing. Best sequencer UI for phone imho.”
So much fun! · Martha Proton
App Store review · v1.0.2
“Very well thought out, it’s so fun and functional. Would love a few more straightforward style choices like pop and rock. Kinda all techno heavy styles currently.”
Well made! · andyspocket
App Store review · 5 stars
“I bought a lifetime license minutes after using the app with OP-XY. Ridiculously easy to set up and super fun as an idea starter. A great way to explore genres you’re not familiar with.”
Delightfully simple, super inspiring · Meatball Merlot
App Store review · 5 stars
“Very good idea. Thank you for all your efforts, the app is a joy to use.”
WOW Great · alf1959
App Store review · 5 stars
FAQ
Questions, answered
What is a generative MIDI sequencer?
Does Sequentia work with modular and hardware synths?
Is Sequentia available on iPhone?
Does it work offline and collect my data?
Does Sequentia make sound without MIDI hardware?
Are CC Control, Live Performer and Euclid free?
What does CC Control do?
What is Live Performer?
How does the Euclid module work?
Will the phone sound double my hardware synth?
Can one module control several MIDI channels?
Is Sequentia free?
PRICING
Start free. Go Pro when you’re ready.
The full instrument to hardware is free forever. Pro unlocks the generative tools, every drum style and unlimited projects.
FREE
$0
The full instrument to hardware, forever. Now with sound of its own.
All thirteen module types and manual editing
Live play, MIDI Clock and per-module routing
The full built-in sound engine, all 87 sounds
Three drum genres, basic Random and 1 project
Download free
SEQUENTIA PRO
$19.99
/ year
Or $3.99/mo · or $39.99 lifetime · 3-day free trial
All drum styles, including house, electro and DnB
Mutate, Fills, Humanize & Chop
Pattern & preset libraries, unlimited projects
Send to DAW & MIDI export
Start 3-day free trial