Clip Slicer

Right-click a Session View audio clip → Slice into 4-Bar Clips — the clip's audio is cut into separate 4-bar session clips, starting at the clip's "1" (its loop start) and covering the entire audio file up to where trailing silence begins. The active loop brace is ignored; a 1-bar brace on a 3-minute recording still slices the whole recording.

Two menu entries on audio clips:

Entry	How it slices
Slice into 4-Bar Clips	Bounce (default): each 4-bar window is rendered through the clip's warping (renderPreFxAudio via a temp arrangement clip), imported into the project, and the slice plays that rendered file. Timing is baked in — slices need no warp markers.
Slice into 4-Bar Clips (by reference)	Instant: each slice is a new clip windowing the original file via loop markers. Requires the file's saved warp to match the clip (checked).

Slices fill the empty slots below the original (appending scenes as needed), inherit its name and color (Groove 1, Groove 2, …). Reference-mode slices are created in one undo step.

Details & guards

• Region: from the clip's loop start ("the 1") to the end of the audio file. File length is read from the container header (WAV/AIFF) and mapped through the clip's warp markers.
• Trailing-silence trim: the file is scanned backwards for the last audio above −48 dBFS (header-based PCM scan; audio-decode fallback for other formats), and only full 4-bar loops before that point are emitted — no partial or silent tail slices.
• Unsaved-warp guard: new clips (and bounce renders) take their warp from the audio file's saved .asd. Before creating anything, a throwaway probe clip checks that the file's saved warp matches the session clip — comparing real markers only (Live's synthetic trailing end/terminator markers are normalized away). On mismatch a popup explains the one-click fix: press the clip's Save button, run again. The SDK cannot save it automatically.
• Errors are popups: refusals and failures show a modal dialog in Live, plus detail in the Extension Host log (region/bars, detected audio end, both warp-marker lists).
• The clip must be warped; 4 bars = 16 beats (4/4 assumed — the SDK has no time-signature API); Session View clips only.

Install in Live

npm install
npm run package        # → Clip-Slicer-0.0.1.ablx

Live → Settings → Extensions → drop the .ablx onto the Extensions page. Note: installed extensions only load when Developer Mode is off. For development, turn Developer Mode on and run npm start (one extension per host — dev mode runs a single extension at a time). Logs: ~/Library/Preferences/Ableton/Live x.x.x/ExtensionHost.txt.

Verify

1. Long warped clip (e.g. 110 bars) with a short active loop → default slice → warp-check log line, progress dialog, N full 4-bar slices below (silent tail excluded), first slice starting exactly on the clip's 1.
2. Clip with hand-warp edits not saved → popup asks for Save; nothing is created. Press Save → run again → proceeds.
3. Reference mode on a saved clip → instant slices, single undo step.
4. ≤ 2 full loops of audio → popup "nothing to slice".