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Monorepo for Aesthetic.Computer aesthetic.computer
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849#!/usr/bin/env nodeimport { writeFile } from 'node:fs/promises';
// Three melodic pulses occupy the same time as two drum pulses.const bpm = 112, cycle = 120 / bpm, cycles = 64, dur = cycle * cycles;const lanes = [ { name: '3 melody', color: [255, 205, 85], events: [], linePosition: [] }, { name: '2 drums', color: [100, 210, 255], events: [], linePosition: [] },];const chords = [[72,76,79], [69,72,76], [65,69,72], [67,71,74]];const hz = n => 440 * 2 ** ((n - 69) / 12);function event(lane, t, length, frequency, g, wave = 'sine', decay = .075) { lanes[lane].events.push({t, dur:length, hz:frequency, g, wave, attack:.012, decay});}for (let c = 0; c < cycles; c++) { const chord = chords[Math.floor(c / 4) % chords.length]; for (let j = 0; j < 3; j++) { const t = c * cycle + j * cycle / 3; event(0, t, cycle / 3 * .68, hz(chord[j] + (c >= 32 && c < 48 ? 12 : 0)), .35); } for (let j = 0; j < 2; j++) { const t = c * cycle + j * cycle / 2; if (j === 0) { event(1, t, .075, 145, .10); event(1, t + .025, .15, 100, .14, 'sine', .11); } else { event(1, t, .075, 440, .055, 'sine', .055); event(1, t, .10, 220, .065, 'sine', .08); } event(1, t, .035, 1100, .018, 'sine', .025); }}const points = Math.ceil(dur * 200);for (let i = 0; i <= points; i++) { const t = i / points * dur; for (let lane = 0; lane < 2; lane++) { const pulse = t / cycle * (lane === 0 ? 3 : 2); const n = Math.floor(pulse), f = pulse - n; const cross = Math.max(0, Math.min(1, (f - .74) / .26)); const side = (n + (lane === 0 ? 1 : 0)) % 2; lanes[lane].linePosition.push(side ? 1 - cross : cross); }}for (const lane of lanes) lane.events.sort((a,b)=>a.t-b.t);const score = {name:'Soft 3 against 2', bpm, geometry:'line', motion:'bounce', seatOrder:[0,1], dur, gain:.42, lanes};await writeFile(new URL('../scores/polyrhythm-bounce.nsscore', import.meta.url), JSON.stringify(score)+'\n');console.log(`3 against 2: ${bpm} BPM, ${dur.toFixed(2)} seconds, ${cycles} cycles`);