Maxim Dolgolyov
29aa985504
- New js/sound.js: shared LS.sfx module with 21 synthesized sounds (ADSR envelope, sequences, sweeps, noise) - Classroom: lesson_start/end, user_joined/left, hand_raise, chat_message, muted, draw_permitted - Dashboard: achievement, level_up, xp_gain, coin via SSE events - Live quiz: quiz_start, quiz_end on question launch and results - Settings panel: global enable toggle + volume slider + localStorage persistence - Replaces old _crBeep() in classroom.html Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
343 lines
14 KiB
JavaScript
343 lines
14 KiB
JavaScript
// LearnSpace — Sound System
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// All sounds synthesized via Web Audio API. No external files needed.
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// Usage: LS.sfx.play('achievement') LS.sfx.setVolume(0.5) LS.sfx.setEnabled(false)
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(function () {
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'use strict';
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// ── AudioContext (lazy, respects autoplay policy) ──────────────────────────
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let _ctx = null;
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function _getCtx() {
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if (!_ctx) {
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_ctx = new (window.AudioContext || window.webkitAudioContext)();
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}
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if (_ctx.state === 'suspended') _ctx.resume();
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return _ctx;
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}
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// ── Master volume node ─────────────────────────────────────────────────────
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let _masterGain = null;
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function _getMaster() {
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if (!_masterGain) {
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_masterGain = _getCtx().createGain();
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_masterGain.connect(_getCtx().destination);
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}
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return _masterGain;
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}
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// ── Low-level synth: single tone with ADSR envelope ───────────────────────
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// freq — Hz
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// dur — total duration ms
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// type — OscillatorType: 'sine'|'square'|'sawtooth'|'triangle'
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// vol — 0–1 (before master)
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// attack — ms
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// release — ms
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function _tone(freq, dur, type, vol, attack, release) {
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type = type || 'sine';
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vol = vol || 0.18;
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attack = attack || 8;
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release = release || Math.min(80, dur * 0.4);
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const ctx = _getCtx();
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const osc = ctx.createOscillator();
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const gain = ctx.createGain();
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osc.connect(gain);
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gain.connect(_getMaster());
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osc.type = type;
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osc.frequency.value = freq;
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const now = ctx.currentTime;
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const durS = dur / 1000;
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const atkS = attack / 1000;
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const relS = release / 1000;
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gain.gain.setValueAtTime(0, now);
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gain.gain.linearRampToValueAtTime(vol, now + atkS);
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if (durS - atkS - relS > 0) {
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gain.gain.setValueAtTime(vol, now + durS - relS);
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}
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gain.gain.linearRampToValueAtTime(0, now + durS);
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osc.start(now);
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osc.stop(now + durS + 0.02);
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}
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// ── Sequence: play notes with delay offsets ────────────────────────────────
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// notes: [ [freq, dur, delayMs, type?, vol?], ... ]
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function _seq(notes, defaultType, defaultVol) {
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notes.forEach(function (n) {
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setTimeout(function () {
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_tone(n[0], n[1], n[2] || defaultType || 'sine', n[3] !== undefined ? n[3] : (defaultVol || 0.15));
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}, n[4] || 0);
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});
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}
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// ── Noise burst (for 'error' thud) ────────────────────────────────────────
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function _noise(dur, vol) {
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const ctx = _getCtx();
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const bufSize = ctx.sampleRate * (dur / 1000);
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const buf = ctx.createBuffer(1, bufSize, ctx.sampleRate);
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const data = buf.getChannelData(0);
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for (let i = 0; i < bufSize; i++) data[i] = Math.random() * 2 - 1;
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const src = ctx.createBufferSource();
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const gain = ctx.createGain();
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const filt = ctx.createBiquadFilter();
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src.buffer = buf;
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filt.type = 'lowpass';
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filt.frequency.value = 400;
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src.connect(filt); filt.connect(gain); gain.connect(_getMaster());
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const now = ctx.currentTime;
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const durS = dur / 1000;
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gain.gain.setValueAtTime(vol || 0.12, now);
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gain.gain.linearRampToValueAtTime(0, now + durS);
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src.start(now);
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src.stop(now + durS + 0.02);
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}
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// ── Sweep (pitch glide) ────────────────────────────────────────────────────
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function _sweep(f1, f2, dur, type, vol) {
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const ctx = _getCtx();
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const osc = ctx.createOscillator();
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const gain = ctx.createGain();
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osc.connect(gain); gain.connect(_getMaster());
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osc.type = type || 'sine';
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const now = ctx.currentTime;
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const durS = dur / 1000;
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osc.frequency.setValueAtTime(f1, now);
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osc.frequency.linearRampToValueAtTime(f2, now + durS);
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gain.gain.setValueAtTime(vol || 0.14, now);
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gain.gain.linearRampToValueAtTime(0, now + durS);
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osc.start(now);
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osc.stop(now + durS + 0.02);
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}
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// ── Sound definitions ──────────────────────────────────────────────────────
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const _sounds = {
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// ── UI ────────────────────────────────────────────────────────────────
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click: function () {
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_tone(1200, 40, 'sine', 0.10, 2, 30);
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},
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success: function () {
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_tone(523, 100, 'sine', 0.14, 8, 60);
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setTimeout(function () { _tone(659, 120, 'sine', 0.16, 8, 70); }, 90);
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setTimeout(function () { _tone(784, 180, 'sine', 0.18, 8, 100); }, 190);
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},
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error: function () {
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_tone(200, 180, 'sawtooth', 0.14, 5, 120);
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_noise(180, 0.06);
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setTimeout(function () { _tone(150, 200, 'sawtooth', 0.12, 5, 150); }, 150);
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},
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notification: function () {
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_tone(880, 80, 'sine', 0.13, 5, 50);
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setTimeout(function () { _tone(1108, 120, 'sine', 0.15, 5, 80); }, 90);
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},
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// ── Classroom ─────────────────────────────────────────────────────────
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hand_raise: function () {
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_tone(660, 100, 'sine', 0.14, 8, 60);
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setTimeout(function () { _tone(880, 140, 'sine', 0.17, 8, 90); }, 110);
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},
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chat_message: function () {
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_tone(880, 90, 'triangle', 0.13, 5, 60);
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},
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user_joined: function () {
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_sweep(392, 523, 140, 'sine', 0.13);
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setTimeout(function () { _tone(659, 120, 'sine', 0.12, 5, 80); }, 150);
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},
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user_left: function () {
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_sweep(523, 392, 140, 'sine', 0.11);
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setTimeout(function () { _tone(330, 120, 'sine', 0.09, 5, 80); }, 150);
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},
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muted: function () {
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_tone(300, 80, 'triangle', 0.13, 5, 60);
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_noise(100, 0.05);
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},
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draw_permitted: function () {
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_tone(784, 80, 'sine', 0.13, 5, 50);
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setTimeout(function () { _tone(1047, 80, 'sine', 0.14, 5, 50); }, 85);
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setTimeout(function () { _tone(1319, 140, 'sine', 0.16, 5, 90); }, 170);
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},
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lesson_start: function () {
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// C4-E4-G4 major chord arpeggio up
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_tone(261, 160, 'sine', 0.14, 10, 100);
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setTimeout(function () { _tone(330, 160, 'sine', 0.14, 10, 100); }, 130);
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setTimeout(function () { _tone(392, 280, 'sine', 0.16, 10, 160); }, 260);
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setTimeout(function () { _tone(523, 350, 'sine', 0.18, 10, 220); }, 390);
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},
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lesson_end: function () {
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// G4-E4-C4 descending
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_tone(392, 160, 'sine', 0.15, 10, 100);
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setTimeout(function () { _tone(330, 160, 'sine', 0.14, 10, 100); }, 140);
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setTimeout(function () { _tone(261, 350, 'sine', 0.13, 10, 220); }, 280);
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},
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// ── Gamification ──────────────────────────────────────────────────────
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xp_gain: function () {
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_tone(880, 60, 'sine', 0.10, 3, 40);
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},
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level_up: function () {
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// Fanfare: C4-E4-G4-C5
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var notes = [
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[261, 120, 'sine', 0.15, 0],
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[330, 120, 'sine', 0.15, 110],
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[392, 120, 'sine', 0.15, 220],
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[523, 360, 'sine', 0.20, 330],
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];
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notes.forEach(function (n) {
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setTimeout(function () { _tone(n[0], n[1], n[2], n[3]); }, n[4]);
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});
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// Harmony on last note
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setTimeout(function () { _tone(659, 360, 'sine', 0.12); }, 330);
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setTimeout(function () { _tone(784, 360, 'sine', 0.10); }, 330);
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},
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achievement: function () {
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// C5-E5-G5-E5-C6 sparkle
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var notes = [
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[523, 100, 0],
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[659, 100, 95],
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[784, 100, 190],
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[659, 100, 285],
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[1047, 300, 380],
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];
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notes.forEach(function (n) {
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setTimeout(function () { _tone(n[0], n[1], 'sine', 0.16); }, n[2]);
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});
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// Shimmer
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setTimeout(function () { _tone(1319, 200, 'triangle', 0.08); }, 450);
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setTimeout(function () { _tone(1047, 300, 'triangle', 0.06); }, 550);
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},
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coin: function () {
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_tone(1319, 50, 'sine', 0.14, 2, 35);
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setTimeout(function () { _tone(1047, 80, 'triangle', 0.10, 2, 60); }, 55);
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},
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streak: function () {
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_tone(523, 80, 'sine', 0.13, 5, 55);
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setTimeout(function () { _tone(659, 80, 'sine', 0.14, 5, 55); }, 80);
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setTimeout(function () { _tone(784, 160, 'sine', 0.16, 5, 100); }, 160);
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},
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// ── Quiz ──────────────────────────────────────────────────────────────
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quiz_start: function () {
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// 3-2-1 countdown beeps
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_tone(440, 100, 'sine', 0.15, 5, 70);
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setTimeout(function () { _tone(440, 100, 'sine', 0.15, 5, 70); }, 700);
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setTimeout(function () { _tone(880, 200, 'sine', 0.20, 5, 120); }, 1400);
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},
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quiz_correct: function () {
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_tone(659, 90, 'sine', 0.15, 5, 60);
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setTimeout(function () { _tone(880, 160, 'sine', 0.18, 5, 100); }, 95);
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},
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quiz_wrong: function () {
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_tone(220, 200, 'sawtooth', 0.13, 5, 150);
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setTimeout(function () { _tone(180, 250, 'sawtooth', 0.10, 5, 200); }, 180);
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},
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quiz_end: function () {
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// C major chord burst
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_tone(523, 400, 'sine', 0.14, 10, 250);
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_tone(659, 400, 'sine', 0.12, 10, 250);
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_tone(784, 400, 'sine', 0.10, 10, 250);
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setTimeout(function () { _tone(1047, 500, 'sine', 0.18, 10, 350); }, 350);
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},
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quiz_tick: function () {
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_tone(660, 40, 'square', 0.08, 2, 25);
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},
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};
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// ── Persistence ───────────────────────────────────────────────────────────
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var LS_SFX_KEY = 'ls_sfx';
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function _load() {
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try {
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var raw = localStorage.getItem(LS_SFX_KEY);
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return raw ? JSON.parse(raw) : null;
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} catch (e) { return null; }
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}
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function _save() {
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try {
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localStorage.setItem(LS_SFX_KEY, JSON.stringify({
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enabled : sfx.enabled,
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volume : sfx.volume,
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prefs : sfx.prefs,
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}));
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} catch (e) {}
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}
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// ── Public API ─────────────────────────────────────────────────────────────
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var sfx = {
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enabled : true,
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volume : 0.75,
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prefs : {
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ui : true,
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classroom : true,
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gamification : true,
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quiz : true,
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},
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// Category map — which prefs key each sound belongs to
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_cats: {
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click: 'ui', success: 'ui', error: 'ui', notification: 'ui',
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hand_raise: 'classroom', chat_message: 'classroom',
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user_joined: 'classroom', user_left: 'classroom',
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muted: 'classroom', draw_permitted: 'classroom',
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lesson_start: 'classroom', lesson_end: 'classroom',
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xp_gain: 'gamification', level_up: 'gamification',
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achievement: 'gamification', coin: 'gamification', streak: 'gamification',
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quiz_start: 'quiz', quiz_correct: 'quiz', quiz_wrong: 'quiz',
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quiz_end: 'quiz', quiz_tick: 'quiz',
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},
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play: function (name) {
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if (!this.enabled) return;
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var cat = this._cats[name];
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if (cat && !this.prefs[cat]) return;
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if (!_sounds[name]) return;
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// Apply volume to master gain
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if (_masterGain) _masterGain.gain.value = this.volume;
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try { _sounds[name](); } catch (e) {}
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},
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setEnabled: function (v) {
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this.enabled = !!v;
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_save();
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},
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setVolume: function (v) {
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this.volume = Math.max(0, Math.min(1, parseFloat(v) || 0));
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if (_masterGain) _masterGain.gain.value = this.volume;
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_save();
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},
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setPref: function (cat, v) {
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if (this.prefs.hasOwnProperty(cat)) {
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this.prefs[cat] = !!v;
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_save();
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}
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},
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init: function () {
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var saved = _load();
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if (!saved) return;
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if (saved.enabled !== undefined) this.enabled = saved.enabled;
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if (saved.volume !== undefined) this.volume = saved.volume;
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if (saved.prefs) {
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var self = this;
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Object.keys(saved.prefs).forEach(function (k) {
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if (self.prefs.hasOwnProperty(k)) self.prefs[k] = saved.prefs[k];
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});
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}
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},
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};
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// Attach to LS namespace
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window.LS = window.LS || {};
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window.LS.sfx = sfx;
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// Auto-init on load
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sfx.init();
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})();
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