# OR-1 MIDI Sequencer — MIDI sequencer, no synth

> Generative MIDI Note-FX for controlling external music hardware. (iPhone/iPad app by Jori Eero Larres.)

- Source: https://appshunter.io/ios/app/or-1-midi-sequencer/id6789592969 (this page in markdown: same URL + `.md`)
- Developer: [Jori Eero Larres](https://appshunter.io/developer/6789592971)
- Category: Music, Utilities
- Price: Free
- Rating: 5.00/5 from 7 App Store ratings
- Age rating: 4+
- Requires: iOS 15.0 · 9 MB
- Released: 2026-08-16
- Data updated: 2026-09-29
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/or-1-midi-sequencer/id6789592969/reviews.md

## What is OR?

OR-1 makes no sound on its own. It's a generative MIDI Note-FX — the brain, not the sound source — that plays your own synths, samplers, and drum machines for you…

- Euclidean
- Polyrhythm
- Stochastic drift
- Modulators
- Scale quantizer with chord lock
- Temp and random for performance 
- MIDI Learn

## Key features

- Euclidean sequencing
- Polyrhythm generation
- Stochastic drift
- Modulators
- Scale quantizer with chord lock
- Tempo and random performance controls
- MIDI Learn


## Frequently asked questions about OR

### 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.

## Version history (last 2 releases)

### 1.1.1 — 2026-08-28

Fixes a bug that prevented OR-1 from opening in Ableton Live and other hosts — the plug-in identified itself as an audio effect rather than an instrument, so hosts refused to load it on a track.

Fixes the plug-in interface becoming unresponsive when hosted in AUM and other AUv3 hosts, which previously required restarting the host app.

The interface now scales to fit the host's panel, so every control is reachable without scrolling.

Parameter values now display in readable units — Drift, Gate and Level as percentages, modulator Rate in Hz.

Note: OR-1 is a MIDI sequencer. It generates MIDI to drive your own instruments and produces no sound on its own.

### 1.0.0 — 2026-07-20

No release notes.

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*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 2026-09-29.*