Excellent sequencer - especially for horror.
A great lil seq. The riding falling arps engine w/ Euclidian engine is classic horror recipe. I like this seq
Free
About
This application acts as a generative MIDI Note-FX, controlling external synths, samplers, and drum machines. It offers advanced features like Euclidean and polyrhythmic sequencing, stochastic drift, and scale quantization with chord lock. Designed for musicians to create complex MIDI patterns without generating sound itself.
✓Euclidean sequencing
✓Polyrhythm generation
✓Stochastic drift
✓Modulators
✓Scale quantizer with chord lock
✓Tempo and random performance controls
✓MIDI Learn
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What's New in OR
1.2.1
October 20, 2026
OR—1 now fills the screen. On the 13-inch iPad the whole layout grows and spreads out to the edges, with the voice rows, visualizer and footer using the full display. On the 11-inch iPad and iPad mini it reflows to fit. Bigger touch targets: the pills now get 44 pt tap areas wherever there is room, and the chord-lock controls are easier to hit. The visualizer is sharper, drawn at full Retina resolution. MIDI Learn stays armed when you tap the control you are assigning. Several factory presets now use the modulators more: Tuplet Fracture, Markov Debris, Aksak Nine and Chord Bloom route M1, M2 and M3 across all four voices.
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FAQ
Does OR-1 make any sound on its own?
No, OR-1 is a generative MIDI Note-FX and does not produce any sound itself. It functions as the 'brain' to control your external synths, samplers, and drum machines.
What kind of music creation features does OR-1 offer?
OR-1 supports Euclidean and polyrhythmic sequencing, stochastic drift, modulators, scale quantization with chord lock, and tempo/random controls for performance.
What devices is OR-1 compatible with?
OR-1 is currently supported on iPad devices.
How often is OR-1 updated?
The latest version, 1.1.1, was released on August 28, 2026, indicating recent development activity. The initial release was on August 16, 2026.
What is the age rating for OR-1?
OR-1 has an age rating of 4+, making it suitable for a wide range of users.
Does OR-1 have ads?
No, OR-1 does not contain advertisements.
What is the user sentiment for OR-1?
OR-1 has received overwhelmingly positive feedback, with an average rating of 5.0 stars from 7 ratings.
Can OR-1 learn MIDI messages?
Yes, OR-1 features MIDI Learn functionality, allowing it to learn MIDI messages for enhanced control.
