midi-note-index-select-0.1.0.ablx

VERSION HISTORY

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1.0.0 — August 18, 2026

• Initial release

• Interval selection: every, odd, even, modulo

• Semitone transposition (-24 to +24)

• Scale snap with 15 scales and 12 root notes

• Selected notes scope

• Modulo mode with Mod and Remainder controls

• Apply and Undo buttons

• Full Ableton undo stack support

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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

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Gregg Mazel — Mazel Musical Arts

Weymouth, Nova Scotia, Canada