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https://github.com/curioustorvald/tsvm.git
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126 lines
4.4 KiB
JavaScript
126 lines
4.4 KiB
JavaScript
/**
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* TSVM Audio Device Tracker
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*
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* Created by minjaesong on 2026-04-20
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*/
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const win = require("wintex")
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const sym = {
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/* accidentals */
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accnull:"\u0094\u0095"
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demisharp:"\u0094\u0080",
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sharp:"\u0094\u0081",
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sesquisharp:"\u0082\u0083",
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doublesharp:"\u0094\u0084",
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triplesharp:"\u0081\u0084",
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quadsharp:"\u0085\u0086",
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demiflat:"\u0094\u0087",
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flat:"\u0094\u0088",
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sesquiflat:"\u0090\u0091",
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doubleflat:"\u0089\u008A",
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tripleflat:"\u008B\u008C",
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quadflat:"\u008D\u008E",
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/* special notes */
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keyoff:"\u0092\u00CD\u00CD\u0093",
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notecut:"\u008F\u008F\u008F\u008F",
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/* miscellaneous */
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cent:"\u009B",
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unticked:"\u009E",
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ticked:"\u009F",
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}
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const pitchTablePresets = [
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{name:"null", table:[]},
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/* Xenharmonic, equal temperament */
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{name:"5-TET", table:[0x0,0x333,0x666,0x99A,0xCCD]},
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{name:"7-TET", table:[0x0,0x249,0x492,0x6DB,0x925,0xB6E,0xDB7]},
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{name:"10-TET", table:[0x0,0x19A,0x333,0x4CD,0x666,0x800,0x99A,0xB33,0xCCD,0xE66]},
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{name:"16-TET", table:[0x0,0x100,0x200,0x300,0x400,0x500,0x600,0x700,0x800,0x900,0xA00,0xB00,0xC00,0xD00,0xE00,0xF00]},
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{name:"19-TET", table:[0x0,0xD8,0x1AF,0x287,0x35E,0x436,0x50D,0x5E5,0x6BD,0x794,0x86C,0x943,0xA1B,0xAF3,0xBCA,0xCA2,0xD79,0xE51,0xF28]},
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{name:"22-TET", table:[0x0,0xBA,0x174,0x22F,0x2E9,0x3A3,0x45D,0x517,0x5D1,0x68C,0x746,0x800,0x8BA,0x974,0xA2F,0xAE9,0xBA3,0xC5D,0xD17,0xDD1,0xE8C,0xF46]},
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{name:"24-TET", table:[0x0,0xAB,0x155,0x200,0x2AB,0x355,0x400,0x4AB,0x555,0x600,0x6AB,0x755,0x800,0x8AB,0x955,0xA00,0xAAB,0xB55,0xC00,0xCAB,0xD55,0xE00,0xEAB,0xF55]},
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{name:"31-TET", table:[0x0,0x84,0x108,0x18C,0x211,0x295,0x319,0x39D,0x421,0x4A5,0x529,0x5AD,0x632,0x6B6,0x73A,0x7BE,0x842,0x8C6,0x94A,0x9CE,0xA53,0xAD7,0xB5B,0xBDF,0xC63,0xCE7,0xD6B,0xDEF,0xE74,0xEF8,0xF7C]},
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{name:"53-TET", table:[0x0,0x4D,0x9B,0xE8,0x135,0x182,0x1D0,0x21D,0x26A,0x2B8,0x305,0x352,0x39F,0x3ED,0x43A,0x487,0x4D5,0x522,0x56F,0x5BC,0x60A,0x657,0x6A4,0x6F2,0x73F,0x78C,0x7D9,0x827,0x874,0x8C1,0x90E,0x95C,0x9A9,0x9F6,0xA44,0xA91,0xADE,0xB2B,0xB79,0xBC6,0xC13,0xC61,0xCAE,0xCFB,0xD48,0xD96,0xDE3,0xE30,0xE7E,0xECB,0xF18,0xF65,0xFB3]},
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/* 12-TET variations */
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{name:"12-TET", table:[0x0,0x155,0x2AB,0x400,0x555,0x6AB,0x800,0x955,0xAAB,0xC00,0xD55,0xEAB]},
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{name:"Pythagorean Diminished Fifth", table:[0x0,0x134,0x2B8,0x3EC,0x570,0x6A4,0x7D8,0x95C,0xA90,0xC14,0xD48,0xECC]},
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{name:"Pythagorean Augmented Fourth", table:[0x0,0x134,0x2B8,0x3EC,0x570,0x6A4,0x828,0x95C,0xA90,0xC14,0xD48,0xECC]},
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{name:"Shierlu", table:[0x0,0x184,0x2B8,0x43C,0x570,0x6F4,0x828,0x95C,0xAE0,0xC14,0xD98,0xECC]},
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]
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function noteName4096(n) {
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const N = 4096;
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// 12-TET natural note positions (C..B)
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const d12 = [0, 2, 4, 5, 7, 9, 11];
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const letters = ['C', 'D', 'E', 'F', 'G', 'A', 'B'];
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// Precompute bases (integer-rounded)
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// base[i] = round(d12[i] * N / 12)
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const base = d12.map(d => ((d * N + 6) / 12) | 0);
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// Scale everything by 24 (quarter-semitone grid)
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const pitch24 = n * 24;
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const N24 = N; // because k multiplies N directly in scaled space
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let best_i = 0;
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let best_k = 0;
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let best_score = Infinity;
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const KMAX = 8; // up to quad accidentals (±8 quarter-steps)
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for (let i = 0; i < 7; i++) {
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const base24 = base[i] * 24;
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const delta = pitch24 - base24;
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// nearest integer k ≈ delta / N
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let k = ((delta + (delta >= 0 ? N24 / 2 : -N24 / 2)) / N24) | 0;
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// clamp to allowed accidentals
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if (k > KMAX) k = KMAX;
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if (k < -KMAX) k = -KMAX;
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const err = Math.abs(delta - k * N24);
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// scoring: prioritize pitch accuracy, then smaller accidentals
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const score = err * 1000 + Math.abs(k) * 10;
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if (score < best_score) {
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best_score = score;
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best_i = i;
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best_k = k;
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}
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}
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// accidental mapping
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function accidental(k) {
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switch (k) {
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case 0: return sym.accnull;
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case 1: return sym.demisharp;
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case 2: return sym.sharp;
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case 3: return sym.sesquisharp;
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case 4: return sym.doublesharp;
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case 5: return sym.triplesharp;
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case 6: return sym.quadsharp;
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case -1: return sym.demiflat;
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case -2: return sym.flat;
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case -3: return sym.sesquiflat;
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case -4: return sym.doubleflat;
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case -5: return sym.tripleflat;
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case -6: return sym.quadflat;
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default:
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// fallback if you extend beyond quad
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return (k > 0 ? '+' : '-') + k.toString(36);
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}
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}
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// octave (C-based)
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const octave = ((n / N)|0) + 1;
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return letters[best_i] + accidental(best_k) + octave;
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} |