tension.py
python
sha256:be3641f35bdbcc094677776a77b9aa6a5dab891f8fab201dc162d03c2bab5aea
fix(read): strip position:null from structured_delta ops in…
Sonnet 4.6
patch
24 days ago
| 1 | """muse tension — harmonic tension curve for a MIDI track. |
| 2 | |
| 3 | Scores each bar's dissonance level from 0 (perfectly consonant) to 1 |
| 4 | (maximally tense). Agents composing multi-part music or reviewing agent- |
| 5 | generated harmony use this to verify that tension builds toward climaxes and |
| 6 | resolves at cadences — an impossible analysis in Git's binary-blob world. |
| 7 | |
| 8 | Usage:: |
| 9 | |
| 10 | muse tension tracks/chords.mid |
| 11 | muse tension tracks/piano.mid --commit HEAD~2 |
| 12 | muse tension tracks/strings.mid --json |
| 13 | |
| 14 | Output:: |
| 15 | |
| 16 | Harmonic tension: tracks/chords.mid — working tree |
| 17 | |
| 18 | bar 1 ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁ 0.05 consonant |
| 19 | bar 2 ████████ 0.41 mild |
| 20 | bar 3 ████████████████ 0.72 tense |
| 21 | bar 4 ████ 0.21 mild |
| 22 | ... |
| 23 | """ |
| 24 | |
| 25 | import argparse |
| 26 | import json |
| 27 | import logging |
| 28 | import pathlib |
| 29 | import sys |
| 30 | |
| 31 | from muse.core.types import short_id |
| 32 | from muse.core.errors import ExitCode |
| 33 | from muse.core.repo import require_repo |
| 34 | from muse.core.refs import read_current_branch |
| 35 | from muse.core.commits import resolve_commit_ref |
| 36 | from muse.plugins.midi._analysis import compute_tension |
| 37 | from muse.plugins.midi._query import load_track, load_track_from_workdir |
| 38 | |
| 39 | logger = logging.getLogger(__name__) |
| 40 | |
| 41 | _BAR_WIDTH = 20 |
| 42 | |
| 43 | def _read_branch(root: pathlib.Path) -> str: |
| 44 | return read_current_branch(root) |
| 45 | |
| 46 | def _tension_bar(tension: float) -> str: |
| 47 | blocks = ["▁", "▂", "▃", "▄", "▅", "▆", "▇", "█"] |
| 48 | level = int(tension * (_BAR_WIDTH - 1)) |
| 49 | block = blocks[min(int(tension * 7), 7)] |
| 50 | return block * level |
| 51 | |
| 52 | def register(subparsers: "argparse._SubParsersAction[argparse.ArgumentParser]") -> None: |
| 53 | """Register the tension subcommand.""" |
| 54 | parser = subparsers.add_parser("tension", help="Show the harmonic tension arc of a MIDI track bar by bar.", description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter) |
| 55 | parser.add_argument("track", metavar="TRACK", help="Workspace-relative path to a .mid file.") |
| 56 | parser.add_argument("--commit", "-c", metavar="REF", default=None, dest="ref", help="Analyse a historical snapshot instead of the working tree.") |
| 57 | parser.add_argument("--json", action="store_true", dest="as_json", help="Emit results as JSON.") |
| 58 | parser.set_defaults(func=run) |
| 59 | |
| 60 | def run(args: argparse.Namespace) -> None: |
| 61 | """Show the harmonic tension arc of a MIDI track bar by bar. |
| 62 | |
| 63 | ``muse tension`` uses interval dissonance weights to score each bar's |
| 64 | harmonic complexity. A well-structured composition typically builds |
| 65 | tension toward phrase climaxes and resolves it at cadence points. |
| 66 | |
| 67 | Agents can use this as an automated quality gate: if tension is flat or |
| 68 | unresolved at expected cadence points, the composition needs revision. |
| 69 | """ |
| 70 | track: str = args.track |
| 71 | ref: str | None = args.ref |
| 72 | as_json: bool = args.as_json |
| 73 | |
| 74 | root = require_repo() |
| 75 | commit_label = "working tree" |
| 76 | |
| 77 | if ref is not None: |
| 78 | branch = _read_branch(root) |
| 79 | commit = resolve_commit_ref(root, branch, ref) |
| 80 | if commit is None: |
| 81 | print(f"❌ Commit '{ref}' not found.", file=sys.stderr) |
| 82 | raise SystemExit(ExitCode.USER_ERROR) |
| 83 | result = load_track(root, commit.commit_id, track) |
| 84 | commit_label = commit.commit_id |
| 85 | else: |
| 86 | result = load_track_from_workdir(root, track) |
| 87 | |
| 88 | if result is None: |
| 89 | print(f"❌ Track '{track}' not found or not a valid MIDI file.", file=sys.stderr) |
| 90 | raise SystemExit(ExitCode.USER_ERROR) |
| 91 | |
| 92 | notes, _tpb = result |
| 93 | if not notes: |
| 94 | print(f" (no notes found in '{track}')") |
| 95 | return |
| 96 | |
| 97 | bars = compute_tension(notes) |
| 98 | |
| 99 | if as_json: |
| 100 | print(json.dumps( |
| 101 | {"track": track, "commit": commit_label, "bars": list(bars)}, |
| 102 | )) |
| 103 | return |
| 104 | |
| 105 | print(f"\nHarmonic tension: {track} — {commit_label}\n") |
| 106 | for b in bars: |
| 107 | bar_str = _tension_bar(b["tension"]) |
| 108 | print( |
| 109 | f" bar {b['bar']:>3} {bar_str:<{_BAR_WIDTH}}" |
| 110 | f" {b['tension']:.3f} {b['label']}" |
| 111 | ) |
File History
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sha256:36c3cb3e76619d4c30a6d9bf81b5ec4ff148e30dcfed913e3114ca7b43b81c7e
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Sonnet 4.6
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sha256:c06a9b9b9fee26c68ea725b44d54b2c0a171301ce9de746d5b656617b4463a9a
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Sonnet 4.6
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sha256:1900655993c83c4107067375548a7be823e471d2515830842f1a12cba4bd3cdf
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Sonnet 4.6
minor
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29 days ago