Release Slab 0.0.8 · nooga/slab

Warp an audio clip (right-click → Warp, or WARP in the audio clip
editor): it locks to the beat and follows the tempo, tempo changes and
ramps included. Short loops (30 s or less) arrive warped when imported,
at the tempo Slab hears in them, so they play in the song's tempo right
away.
⌘-drag a clip's edge to stretch it; a plain drag still trims.
Five ways to stretch (MODE in the audio clip editor):
- TAPE: like a tape, speed and pitch move together.
- BEATS, for drums and loops: cut at the hits, each played at its
  own speed from where it lands, so hits stay sharp at any tempo.
  PRESERVE cuts at the hits or every 1/16, 1/8, 1/4; GAP fills a
  stretched slice with silence or its looped tail; DECAY shortens each
  slice.
- MIX, for anything (full mixes, pads, chords): a phase vocoder that
  keeps the pitch, resets on hits and holds the stereo image.
- VOICE, for vocals, bass and leads: matched grains, no phasing;
  GRAIN sets their length.
- SMEAR: Paulstretch-style extreme stretching into texture; SIZE
  sets how much.
  Warping picks BEATS for short loops full of hits and MIX for the rest.
TRANSPOSE and FINE in every mode but TAPE: pitch apart from time.

Hits: Slab finds them in every audio file, shown as ticks in the
audio clip editor.
Warp markers: drag a marker and the audio around it stretches;
⌘-drag slides the audio under it; drag a hit straight onto the beat.
Double-click the strip to add one; right-click for Warp straight from
here and more.
SEG BPM in the editor: drag it, double-click to detect the tempo;
Tempo ×2 / ÷2 from the right-click menu.
Quantize hits to grid: a live take's hits pulled onto the grid.
Follow its beats: a take that drifts gets a marker on every bar, so
it stays on the grid.

Warped audio plays the groove: swing a drum loop with the song's or
the track's groove, like the notes.
Extract groove from an audio clip's hits: a drummer's feel for your
MIDI tracks.
Song follows this clip: the song's tempo map from a warped take, so
a performance played without a click sets the tempo for everything.
Slice to a sampler track: a loop cut at its hits onto sampler pads
from C1 up, with a pattern playing them where they played; rearrange
the break as notes.

Stereo clips draw both channels, left over right.
Clips play through a band-limited resampler: cleaner rate changes, no
aliasing when sped up.
Unwarped clips no longer drag past the end of their audio, and the
waveform no longer stretches across silence.

track.audio(..., warp=bpm) or fit_beats=, with mode="tape",
"beats" (preserve=, gap=, decay=), "mix", "voice"
(grain=) or "smear" (size=), and transpose=, fine=.

Apple Silicon, macOS 13 or later. Built from v0.0.8, which is its complete source (GPL-3.0-or-later, see COPYING.md).

Install:

curl -fsSL https://github.com/nooga/slab/releases/latest/download/install.sh | bash

Or with Homebrew: brew install --cask nooga/tap/slab

Or open the DMG and drag Slab to Applications. It is not notarized, so the first launch needs System Settings > Privacy & Security > Open Anyway.

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