midi-note-index-select
v0.1.0Ableton Live 12 Beta Extension — transpose MIDI notes by index pattern
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midi-note-index-select
An Ableton Live 12 Beta extension that transposes MIDI notes by index pattern.
By Gregg Mazel — mazelmusicalarts.org
Built with help from Claude AI
What it does
Right-click any MIDI clip to:
- Transpose odd/even notes up or down by semitone
- Transpose every Nth note (with offset) by any interval
- Snap transposed notes to a scale and root
- Open the full panel UI for custom interval + transpose settings
Install
Download the latest .ablx from Releases and drag it into
Live 12 Beta → Settings → Extensions.
Development
Requires Node.js ≥ 24 and the Ableton Extensions SDK (beta).
npm install
npm run start # dev mode — connects to Live directly
npm run package # builds .ablx for distribution
Requirements
- Ableton Live 12 Beta
- The Extensions SDK from Centercode
CONTACT
Gregg Mazel — Mazel Musical Arts
Weymouth, Nova Scotia, Canada
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