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. Connect your gear, press play, and steer the algorithm live without ever stopping playback.
OFFLINE
100%
No cloud, no AI. Local algorithm.
DETERMINISTIC
1 seed
Same seed, same pattern. Every time.
CURATED GROOVES
312
Hand-picked drum grooves, not random.
MODULES
7
Stack them freely into one live rack.
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.
NINE 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 in-key bass & melody line. Up to 32 steps with Euclidean fill, slide, accent and four play modes.
02
Drums
An 8-lane machine built from 312 curated grooves across techno, house, electro and DnB, with Fills, Humanize, Chop and per-voice mixing.
03
Piano
A full piano-roll editor for drawing, moving and resizing notes across AABA scene pages, plus an in-key melody generator.
04
Chords
Diatonic progressions up to five voices, a progression library and reharmonizing Mutate. Can drive the Arp live.
05
Arp
An arpeggiator using its own chord or following the Chords module live. Control direction, rate, octaves and Mutate.
06
Mod
One to three tempo-synced LFOs sending MIDI CC. Six shapes with rate, depth, center, phase and fade.
07
Mixer
A control surface for another module’s Solo, Mute and level, per-voice for drums. Makes no sound of its own.
08
Rain
A generative texture of note “raindrops” — drizzle to downpour, always in key. Never a loop: every bar falls differently for living, shimmering motion.
09
Bass
A generative bassline that speaks in genres. Pick from 15 styles and it writes the line in its idiom — from a one-note groove to a full melody.
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 1–4, 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
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
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.
All seven module types & manual editing
Live play, MIDI Clock & per-module routing
Techno drum style, basic Random & 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