motif_detect.py
python
sha256:660fcac1df3ab28f61862e961890bd2ca8b754fa0242079d93ca1e25037ec8a6
chore(tests): add docstring to tests/__init__.py so rc14 tr…
Human
34 days ago
| 1 | """muse motif — recurring melodic pattern detection for a MIDI track. |
| 2 | |
| 3 | Finds repeated interval sequences (motifs) in a melodic line. In a swarm |
| 4 | of agents each writing a section, motif detection ensures that a unifying |
| 5 | melodic idea recurs coherently — or surfaces when it has been accidentally |
| 6 | dropped. |
| 7 | |
| 8 | Usage:: |
| 9 | |
| 10 | muse motif tracks/melody.mid |
| 11 | muse motif tracks/lead.mid --min-length 4 --min-occurrences 3 |
| 12 | muse motif tracks/violin.mid --commit HEAD~2 |
| 13 | muse motif tracks/piano.mid --json |
| 14 | |
| 15 | Output:: |
| 16 | |
| 17 | Motif analysis: tracks/melody.mid — working tree |
| 18 | Found 3 motifs |
| 19 | |
| 20 | Motif 0 [+2 +2 -3] 3× first: D4 bars: 1, 5, 13 |
| 21 | Motif 1 [+4 -2 -2 +1] 2× first: G3 bars: 3, 11 |
| 22 | Motif 2 [-1 -1 +3] 2× first: A4 bars: 7, 15 |
| 23 | """ |
| 24 | |
| 25 | from __future__ import annotations |
| 26 | |
| 27 | import argparse |
| 28 | import json |
| 29 | import logging |
| 30 | import pathlib |
| 31 | import sys |
| 32 | |
| 33 | from muse.core.errors import ExitCode |
| 34 | from muse.core.repo import read_repo_id, require_repo |
| 35 | from muse.core.store import read_current_branch, resolve_commit_ref |
| 36 | from muse.plugins.midi._analysis import find_motifs |
| 37 | from muse.plugins.midi._query import load_track, load_track_from_workdir |
| 38 | from muse.core.validation import clamp_int |
| 39 | |
| 40 | logger = logging.getLogger(__name__) |
| 41 | |
| 42 | |
| 43 | |
| 44 | def _read_branch(root: pathlib.Path) -> str: |
| 45 | return read_current_branch(root) |
| 46 | |
| 47 | |
| 48 | def register(subparsers: "argparse._SubParsersAction[argparse.ArgumentParser]") -> None: |
| 49 | """Register the motif subcommand.""" |
| 50 | parser = subparsers.add_parser("motif", help="Find recurring melodic patterns (motifs) in a MIDI track.", description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter) |
| 51 | parser.add_argument("track", metavar="TRACK", help="Workspace-relative path to a .mid file.") |
| 52 | parser.add_argument("--commit", "-c", metavar="REF", default=None, dest="ref", help="Analyse a historical snapshot instead of the working tree.") |
| 53 | parser.add_argument("--min-length", "-l", metavar="N", type=int, default=3, help="Minimum motif length in notes.") |
| 54 | parser.add_argument("--min-occurrences", "-o", metavar="N", type=int, default=2, dest="min_occ", help="Minimum number of recurrences.") |
| 55 | parser.add_argument("--json", action="store_true", dest="as_json", help="Emit results as JSON.") |
| 56 | parser.set_defaults(func=run) |
| 57 | |
| 58 | |
| 59 | def run(args: argparse.Namespace) -> None: |
| 60 | """Find recurring melodic patterns (motifs) in a MIDI track. |
| 61 | |
| 62 | ``muse motif`` scans the interval sequence between consecutive notes and |
| 63 | finds the most frequently recurring sub-sequences. It ignores transposition |
| 64 | — only the interval pattern (the shape) matters, not the starting pitch. |
| 65 | |
| 66 | For agents: |
| 67 | - Use ``--min-length 4`` for tighter, more distinctive motifs. |
| 68 | - Use ``--commit`` to check whether a motif introduced in a previous commit |
| 69 | is still present after a merge. |
| 70 | - Combine with ``muse note-log`` to track where a motif first appeared. |
| 71 | """ |
| 72 | track: str = args.track |
| 73 | ref: str | None = args.ref |
| 74 | min_length: int = clamp_int(args.min_length, 1, 1000, 'min_length') |
| 75 | min_occ: int = clamp_int(args.min_occ, 1, 100000, 'min_occ') |
| 76 | as_json: bool = args.as_json |
| 77 | |
| 78 | root = require_repo() |
| 79 | commit_label = "working tree" |
| 80 | |
| 81 | if ref is not None: |
| 82 | repo_id = read_repo_id(root) |
| 83 | branch = _read_branch(root) |
| 84 | commit = resolve_commit_ref(root, repo_id, branch, ref) |
| 85 | if commit is None: |
| 86 | print(f"❌ Commit '{ref}' not found.", file=sys.stderr) |
| 87 | raise SystemExit(ExitCode.USER_ERROR) |
| 88 | result = load_track(root, commit.commit_id, track) |
| 89 | commit_label = commit.commit_id[:8] |
| 90 | else: |
| 91 | result = load_track_from_workdir(root, track) |
| 92 | |
| 93 | if result is None: |
| 94 | print(f"❌ Track '{track}' not found or not a valid MIDI file.", file=sys.stderr) |
| 95 | raise SystemExit(ExitCode.USER_ERROR) |
| 96 | |
| 97 | notes, _tpb = result |
| 98 | if not notes: |
| 99 | print(f" (no notes found in '{track}')") |
| 100 | return |
| 101 | |
| 102 | motifs = find_motifs(notes, min_length=min_length, min_occurrences=min_occ) |
| 103 | |
| 104 | if as_json: |
| 105 | print(json.dumps( |
| 106 | {"track": track, "commit": commit_label, "motifs": list(motifs)}, |
| 107 | indent=2, |
| 108 | )) |
| 109 | return |
| 110 | |
| 111 | print(f"\nMotif analysis: {track} — {commit_label}") |
| 112 | if not motifs: |
| 113 | print( |
| 114 | f" (no motifs found with length ≥ {min_length} and occurrences ≥ {min_occ})" |
| 115 | ) |
| 116 | return |
| 117 | |
| 118 | print(f"Found {len(motifs)} motif{'s' if len(motifs) != 1 else ''}\n") |
| 119 | for m in motifs: |
| 120 | intervals_str = " ".join(f"{iv:+d}" for iv in m["interval_pattern"]) |
| 121 | bars_str = ", ".join(str(b) for b in m["bars"]) |
| 122 | print( |
| 123 | f" Motif {m['id']} [{intervals_str}]" |
| 124 | f" {m['occurrences']}×" |
| 125 | f" first: {m['first_pitch']}" |
| 126 | f" bars: {bars_str}" |
| 127 | ) |
File History
2 commits
sha256:660fcac1df3ab28f61862e961890bd2ca8b754fa0242079d93ca1e25037ec8a6
chore(tests): add docstring to tests/__init__.py so rc14 tr…
Human
34 days ago
sha256:d8316ffae901be06347e16ab55be11868eb519dd16ade3e8aa16a99e662f7e62
baseline: rc14 re-baseline after rc3 store corruption recovery
Human
patch
34 days ago