Add one-line score visualizer with 3D orb and MP4 export

- Verovio single-system engraving, MuseScore audio/MIDI from the same source
- React + Remotion player with live camera, colour and orb controls
- Express pipeline, render queue and local H.264/AAC export
- MIT license plus third-party notices for the reference skill

scripts/check-demo.ts

@@ -0,0 +1,71 @@
+import fs from 'node:fs';
+import path from 'node:path';
+import {parseMusicXml, buildPerformanceOrder} from '../src/server/musicxml.js';
+import {engraveOneLine} from '../src/server/engrave.js';
+import {exportAudioAndMidi} from '../src/server/musescore.js';
+import {parseMidiFile} from '../src/server/midi.js';
+import {buildEvents} from '../src/server/events.js';
+import {readAudioDuration} from '../src/server/audio.js';
+import {DEFAULT_SETTINGS} from '../src/shared/types.js';
+
+const demo = path.resolve('public/demo/demo.musicxml');
+const outDir = path.resolve('data/check');
+fs.mkdirSync(outDir, {recursive: true});
+
+const parsed = parseMusicXml(fs.readFileSync(demo));
+console.log('title', parsed.title, '| composer', parsed.composer);
+console.log('parts', parsed.parts.length, 'measures', parsed.measures.length, 'notes', parsed.allNotes.length);
+console.log('unsupported', parsed.unsupported);
+console.log('warnings', parsed.warnings.slice(0, 5));
+
+const performance = buildPerformanceOrder(parsed.measures, []);
+console.log('performance order length', performance.order.length);
+console.log('order', performance.order.map((i) => i + 1).join(', '));
+
+const engraved = await engraveOneLine(parsed.annotatedXml);
+fs.writeFileSync(path.join(outDir, 'score.svg'), engraved.svg);
+console.log('svg', engraved.geometry.width, 'x', engraved.geometry.height, 'geometry notes', engraved.geometry.noteCount);
+console.log('measure times', engraved.measureStartMs.size, 'note times', engraved.noteTimes.size);
+
+console.time('musescore');
+const {wav, midi} = await exportAudioAndMidi(demo, outDir);
+console.timeEnd('musescore');
+console.log('wav', fs.statSync(wav).size, 'midi', fs.statSync(midi).size);
+
+const audioDuration = await readAudioDuration(wav);
+const parsedMidi = parseMidiFile(midi);
+console.log('audioDuration', audioDuration, 'midi notes', parsedMidi.notes.length, 'midi duration', parsedMidi.duration);
+
+const built = buildEvents({
+  parsed,
+  engrave: engraved,
+  midi: parsedMidi,
+  performanceOrder: performance.order,
+  audioDuration,
+  settings: DEFAULT_SETTINGS,
+});
+console.log('events', built.events.length, 'scroll keys', built.scroll.length);
+console.log('meta', JSON.stringify({...built.meta, warnings: built.meta.warnings.slice(0, 8)}, null, 2));
+console.log('first events', built.events.slice(0, 8));
+console.log('last events', built.events.slice(-5));
+console.log('scroll head', built.scroll.slice(0, 6));
+console.log('scroll tail', built.scroll.slice(-4));
+
+fs.writeFileSync(
+  path.join(outDir, 'score.json'),
+  JSON.stringify(
+    {
+      version: 1,
+      meta: built.meta,
+      events: built.events,
+      activations: built.activations,
+      scroll: built.scroll,
+      svgUrl: '/jobs/check/score.svg',
+      audioUrl: '/jobs/check/audio.wav',
+      settings: DEFAULT_SETTINGS,
+    },
+    null,
+    2,
+  ),
+);
+console.log('wrote', path.join(outDir, 'score.json'));