Slab 0.0.9

Audio into music: hum a line and get notes, put a voice in key, hear a
clip's chords and drums back as Slab instruments, and take a whole song
apart into stems with a neural network running on your Mac.

Audio into music

• Audio to notes: right-click an audio clip and its sung, hummed,
  whistled or played line comes out as notes on a new Cream track under
  it, with a lead sound, or a bass when the line sits under C3. The notes
  land on the song's beats, follow the clip's warp, and are corrected
  for a take that isn't tuned to A440. The clip is muted.
• Hum to notes: right-click a track's arm button to switch it from
  R to N, and a take recorded there turns into notes as soon as
  you stop.
• Tune: put a voice in key. Press TUNE in the audio clip editor,
  or choose Tune from a clip's right-click menu. The key comes from
  the take itself; change it, pick a scale, set SPEED (0 for the
  hard effect, slower for gentle correction) and HUMAN (keep the
  singer's vibrato). The waveform shows the sung and the tuned pitch.
  The voice keeps its own character because its formants stay put. It
  works on warped and unwarped clips, and in slabkit as
  audio(…, tune="A", scale="minor").
• Chords to notes: right-click an audio clip to hear its chords
  back on a pad. Chords, sevenths and the key are found beat by beat,
  even from a full band with drums, and land as a pattern on a new Juno
  track. The clip is named after them ("C Am F G7"), and its Tune key
  is set to the song's.
• Drums to a kit: right-click a drum loop, take or stem and it
  becomes a sampler kit and a pattern. Its hits are sorted into kick,
  snare, hats, toms and percussion on General MIDI keys, and the cleanest
  hit of each becomes its pad. Each hit is judged by what it adds over
  what was already sounding, so bleed under it doesn't fool it. On a
  whole song, Explode runs it on the separated drums: about 87% of hits
  were named right on rendered songs.
• Split into stems: take a song apart into drums, bass, other and
  vocals, each on its own track under the clip and playing in its place.
  It uses HTDemucs, a neural network, running on your Mac through
  CoreML: a three-minute song takes about 15 s. It needs the Extract
  pack (Browser, Packs), which downloads and sets up the model once
  (about 1 GB of tools and 200 MB of model; it needs uv, brew install uv).
• Explode…: one sheet for all of it. Pick stems, drums, bass,
  chords and melody, and a song comes back as stems, a drum kit with its
  pattern, the bassline and melody as notes, and the chords on a pad.
• Extract and Tempo from clip submenus: an audio clip's
  right-click gathers Audio to notes, Chords to notes, Drums to a kit,
  Slice to a sampler track, Split into stems and Explode under
  Extract.
• Song tempo to clip and Section tempo to clip set the whole
  song, or the clip's section, to the tempo the clip was played in. The
  tempo comes from a warped clip's markers, or is detected from an
  unwarped clip's hits. Song follows the clip's changes joins them
  under Tempo from clip.

Fixes

• Hits under a loud bass are found on the hit, not up to 16 ms
  off. That makes warp markers, BEATS slices and grooves from such
  takes sit tighter.
• Slice to sampler on a track at its own tempo ratio (3:2 and the
  like): the new pattern is as long as the clip, and the slices cover all
  of it, the last one included.
• Song follows clip on a track at its own tempo ratio: the tempo
  changes cover the whole clip, and the song's own tempo comes back where
  the clip ends.

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Apple Silicon, macOS 13 or later. Built from v0.0.9, 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.