[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8},"actionData","errors","root",{"_110":111,"_112":113},"routes/embed.x.$handle.$name.$",{"_9":10,"_11":12,"_13":14,"_15":16,"_17":18,"_19":20,"_21":-5},"handle","test_account_001","name","guitar-lab","path","frontend/components/ScaleExplorer.tsx","project",{"_22":49,"_11":12,"_35":50,"_51":-5,"_52":44,"_53":54,"_55":54,"_56":57,"_58":-5,"_59":60,"_61":62,"_63":34,"_64":-5,"_65":-5,"_66":67,"_68":69,"_70":71,"_72":73,"_74":75,"_76":-5,"_77":78,"_79":78,"_80":81,"_82":81,"_83":81,"_84":78,"_85":78,"_86":87,"_88":89,"_90":91,"_92":44},"file",{"_22":23,"_11":24,"_25":26,"_27":28,"_29":30,"_31":32,"_33":34,"_35":36,"_37":38,"_39":40,"_41":42,"_43":44,"_45":-5,"_13":46},"permalink","https://www.val.town/x/test_account_001/guitar-lab/code/frontend/components/ScaleExplorer.tsx","extension","id","36c93a6d-8333-4c6f-a266-4fceeca98fba","ScaleExplorer.tsx","fileId","093bb82c-9e54-11f1-acaa-1607ee4eb77e","parentId","01a02aa4-dbb8-719f-bc42-fe474015a10a","branchId","fe3da5af-30a0-482c-9cfe-bded055894d0","branchVersion",12,"latest",true,"createdAt",["D",1787421924610],"version",3,"fileType","script","content","/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { useState } from \"https://esm.sh/react@18.2.0\";\nimport { SCALES, SHARPS, degreeColor, noteName } from \"../theory.ts\";\nimport { Fretboard } from \"./Fretboard.tsx\";\n\nconst midiToFreq = (midi: number) => 440 * Math.pow(2, (midi - 69) / 12);\n\n/** Ascending scale notes across a comfortable range of the neck. */\nfunction scaleNotesInRange(root: number, pattern: number[]): number[] {\n const notes: number[] = [];\n for (let midi = 45; midi <= 77; midi++) {\n const off = ((midi % 12) - root + 12) % 12;\n if (pattern.includes(off)) notes.push(midi);\n }\n return notes;\n}\n\n/** Play a sequence of notes via Web Audio oscillators. */\nfunction playNotes(midis: number[]) {\n const AC: AudioContext | undefined = (window as any).AudioContext;\n if (!AC) return;\n const ctx = new AC();\n let t = ctx.currentTime + 0.05;\n for (const midi of midis) {\n const osc = ctx.createOscillator();\n const gain = ctx.createGain();\n osc.type = \"triangle\";\n osc.frequency.value = midiToFreq(midi);\n gain.gain.setValueAtTime(0.0001, t);\n gain.gain.exponentialRampToValueAtTime(0.25, t + 0.02);\n gain.gain.exponentialRampToValueAtTime(0.0001, t + 0.8);\n osc.connect(gain).connect(ctx.destination);\n osc.start(t);\n osc.stop(t + 0.85);\n t += 0.32;\n }\n setTimeout(() => ctx.close(), t * 1000 - ctx.currentTime + 500);\n}\n\nexport function ScaleExplorer() {\n const [root, setRoot] = useState(0);\n const [scaleIdx, setScaleIdx] = useState(0);\n const [showIntervals, setShowIntervals] = useState(true);\n\n const scale = SCALES[scaleIdx];\n const degreeNotes = scale.pattern.map((off) => noteName(root + off));\n const colors = scale.pattern.map((off, i) => degreeColor(i));\n const play = scaleNotesInRange(root, scale.pattern);\n\n return (\n

\n \n Root note\n \n setRoot(Number(e.target.value))}\n className=\"border border-gray-300 rounded-lg px-3 py-2 bg-white cursor-pointer\"\n >\n {SHARPS.map((n, i) => )}\n \n

\n \n Scale\n \n setScaleIdx(Number(e.target.value))}\n className=\"border border-gray-300 rounded-lg px-3 py-2 bg-white cursor-pointer\"\n >\n {SCALES.map((s, i) => )}\n \n

\n \n setShowIntervals(e.target.checked)} />\n Intervals\n \n playNotes(play)}\n className=\"bg-emerald-600 hover:bg-emerald-700 text-white text-sm font-medium px-4 py-2 rounded-lg transition-colors cursor-pointer\"\n >\n ▶ Play scale\n \n

\n\n

\n {noteName(root)} / {scale.name}\n

{scale.vibe}

\n\n {/* The actual notes of the scale */}\n

\n {scale.pattern.map((off, i) => (\n \n {degreeNotes[i]}\n \n ))}\n

\n\n \n\n {/* Degree legend */}\n

\n {scale.pattern.map((off, i) => (\n

\n \n {i + 1}\n {degreeNotes[i]}\n

\n ))}\n

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