Chopping and slicing: from phrase to playable slices

Chopping is the move that turns found audio into an instrument. In a live-coding or pad-based set — whether you’re flipping a soul phrase hip-hop style or resequencing an amen for drum-and-bass — the four-bar loop you mined last module is dead weight until its hits are individually triggerable. This module builds toward exactly that whole task: one loop in, a 16-bar re-sequenced passage out, glitched and vocal-chopped enough that a listener can’t reconstruct the source.

Start supported: walk the five-step flow from “sample chopping turns a recorded phrase into triggered slices” against a clean, evenly-cut drum loop, letting transient detection do the cutting and tuning its sensitivity until every hit lands its own slice. Then widen the material — a long unbarred recording, a loose live take — and use the chop-mode-selection principle to justify beats, regions, or manual cuts instead; the capstone will ask you to state that justification for your own source. From there, “Slice to New MIDI Track” is your JIT pointer for getting slices onto a drum rack, where you re-sequence the hits from the pads. The final scaffolded exercises fold in the two texture moves: micro-looping tiny windows Jelinek-style, and shortening release on chopped vocal pads until the voice becomes percussion.

Every required atom gates the capstone — you cannot slice, mode-match, rack-map, glitch, or vocal-chop without them; the two drills (transient tuning, slice-to-rack) must become reflexive because you’ll repeat them for every new source. Supporting atoms enrich the picture: the contiguous-vs-interleaved mapping concept (authored around SOURCE’s /reapply_layout, but the same choice underlies Ableton’s slicing — a drum rack of one-shot pads is the interleaved layout, while dropping the sample into a single Simpler played chromatically is the contiguous, melodic one), hardware-side chop-while-recording, Todd Edwards lineage, tempo-matching order on Maschine, lopsided-groove re-triggering, and velocity layering for when slices grow into instruments.

Runnable examples

Generated from the context/ instrument corpus by concept (redistributable idioms only). Do not edit — regenerate with gen-module-examples.mjs.

sample-chop

s("breaks125:0").chop(8)

_{strudel-0020 · CC0}

d1 $ chop 8 $ sound "break:0"

_{tidal-0019 · CC0}