synthesizer.js

1/** 2 * AI Music Interaction - Synthesizer Engine 3 * Full Instrument Library with Real-Time Web Audio Synthesis 4 */ 5 6// Complete Instrument Library with proper synthesis parameters 7const INSTRUMENTS = [ 8 // === KEYS === 9 { id: 'grand_piano', name: 'Grand Piano', category: 'keys', waveform: 'triangle', attack: 0.005, decay: 0.3, sustain: 0.4, release: 0.8, detune: 2, harmonics: [1, 0.5, 0.25] }, 10 { id: 'bright_piano', name: 'Bright Piano', category: 'keys', waveform: 'sawtooth', attack: 0.002, decay: 0.2, sustain: 0.3, release: 0.6, detune: 3, harmonics: [1, 0.6, 0.3], filter: 4000 }, 11 { id: 'electric_piano', name: 'Electric Piano', category: 'keys', waveform: 'sine', attack: 0.01, decay: 0.4, sustain: 0.5, release: 0.5, detune: 0, harmonics: [1, 0.3, 0.1], tremolo: 4 }, 12 { id: 'rhodes', name: 'Rhodes', category: 'keys', waveform: 'sine', attack: 0.008, decay: 0.5, sustain: 0.3, release: 0.7, detune: 1, harmonics: [1, 0.4, 0.15, 0.05], tremolo: 2 }, 13 { id: 'wurlitzer', name: 'Wurlitzer', category: 'keys', waveform: 'triangle', attack: 0.005, decay: 0.3, sustain: 0.4, release: 0.4, detune: 2, harmonics: [1, 0.5, 0.2] }, 14 { id: 'clavinet', name: 'Clavinet', category: 'keys', waveform: 'square', attack: 0.001, decay: 0.1, sustain: 0.2, release: 0.3, detune: 1, harmonics: [1, 0.8, 0.4], filter: 3000 }, 15 { id: 'harpsichord', name: 'Harpsichord', category: 'keys', waveform: 'sawtooth', attack: 0.001, decay: 0.15, sustain: 0.1, release: 0.4, detune: 3, harmonics: [1, 0.7, 0.5, 0.3], filter: 5000 }, 16 { id: 'celesta', name: 'Celesta', category: 'keys', waveform: 'sine', attack: 0.001, decay: 0.8, sustain: 0.0, release: 1.2, detune: 0, harmonics: [1, 0.2, 0.05] }, 17 { id: 'organ_rock', name: 'Rock Organ', category: 'keys', waveform: 'sine', attack: 0.02, decay: 0.1, sustain: 0.9, release: 0.1, detune: 0, harmonics: [1, 1, 0.5, 0.5, 0.25] }, 18 { id: 'organ_church', name: 'Church Organ', category: 'keys', waveform: 'sine', attack: 0.1, decay: 0.2, sustain: 0.95, release: 0.3, detune: 0, harmonics: [1, 0.8, 0.6, 0.4, 0.3, 0.2] }, 19 { id: 'accordion', name: 'Accordion', category: 'keys', waveform: 'sawtooth', attack: 0.05, decay: 0.1, sustain: 0.8, release: 0.15, detune: 5, harmonics: [1, 0.6, 0.3], filter: 2500 }, 20 { id: 'harmonica', name: 'Harmonica', category: 'keys', waveform: 'sawtooth', attack: 0.03, decay: 0.1, sustain: 0.7, release: 0.2, detune: 3, harmonics: [1, 0.5, 0.25], filter: 2000 }, 21 22 // === STRINGS === 23 { id: 'violin', name: 'Violin', category: 'strings', waveform: 'sawtooth', attack: 0.1, decay: 0.2, sustain: 0.7, release: 0.3, detune: 4, harmonics: [1, 0.5, 0.3, 0.2], filter: 4000, vibrato: 5 }, 24 { id: 'viola', name: 'Viola', category: 'strings', waveform: 'sawtooth', attack: 0.12, decay: 0.2, sustain: 0.7, release: 0.35, detune: 4, harmonics: [1, 0.6, 0.35, 0.2], filter: 3000, vibrato: 4.5 }, 25 { id: 'cello', name: 'Cello', category: 'strings', waveform: 'sawtooth', attack: 0.15, decay: 0.25, sustain: 0.65, release: 0.4, detune: 3, harmonics: [1, 0.6, 0.4, 0.25], filter: 2500, vibrato: 4 }, 26 { id: 'double_bass', name: 'Double Bass', category: 'strings', waveform: 'sawtooth', attack: 0.08, decay: 0.3, sustain: 0.5, release: 0.5, detune: 2, harmonics: [1, 0.7, 0.4], filter: 1500 }, 27 { id: 'string_ensemble', name: 'String Ensemble', category: 'strings', waveform: 'sawtooth', attack: 0.2, decay: 0.3, sustain: 0.8, release: 0.5, detune: 8, harmonics: [1, 0.5, 0.3, 0.2], filter: 3500, vibrato: 3 }, 28 { id: 'acoustic_guitar', name: 'Acoustic Guitar', category: 'strings', waveform: 'triangle', attack: 0.002, decay: 0.4, sustain: 0.2, release: 0.6, detune: 2, harmonics: [1, 0.5, 0.3, 0.15] }, 29 { id: 'electric_guitar_clean', name: 'Electric Guitar (Clean)', category: 'strings', waveform: 'triangle', attack: 0.001, decay: 0.3, sustain: 0.4, release: 0.5, detune: 1, harmonics: [1, 0.4, 0.2] }, 30 { id: 'electric_guitar_dist', name: 'Electric Guitar (Distorted)', category: 'strings', waveform: 'sawtooth', attack: 0.001, decay: 0.2, sustain: 0.7, release: 0.4, detune: 5, harmonics: [1, 0.9, 0.8, 0.6, 0.4], distortion: true }, 31 { id: 'nylon_guitar', name: 'Nylon Guitar', category: 'strings', waveform: 'sine', attack: 0.005, decay: 0.5, sustain: 0.15, release: 0.7, detune: 1, harmonics: [1, 0.4, 0.15] }, 32 { id: 'harp', name: 'Harp', category: 'strings', waveform: 'triangle', attack: 0.001, decay: 0.8, sustain: 0.1, release: 1.5, detune: 0, harmonics: [1, 0.3, 0.1] }, 33 { id: 'banjo', name: 'Banjo', category: 'strings', waveform: 'triangle', attack: 0.001, decay: 0.2, sustain: 0.1, release: 0.3, detune: 3, harmonics: [1, 0.6, 0.4], filter: 4500 }, 34 { id: 'mandolin', name: 'Mandolin', category: 'strings', waveform: 'triangle', attack: 0.001, decay: 0.15, sustain: 0.15, release: 0.3, detune: 4, harmonics: [1, 0.5, 0.3], tremolo: 8 }, 35 36 // === BRASS === 37 { id: 'trumpet', name: 'Trumpet', category: 'brass', waveform: 'sawtooth', attack: 0.02, decay: 0.1, sustain: 0.7, release: 0.2, detune: 2, harmonics: [1, 0.6, 0.4, 0.3], filter: 5000, vibrato: 4 }, 38 { id: 'trombone', name: 'Trombone', category: 'brass', waveform: 'sawtooth', attack: 0.03, decay: 0.15, sustain: 0.65, release: 0.25, detune: 2, harmonics: [1, 0.7, 0.5, 0.3], filter: 3000, vibrato: 3 }, 39 { id: 'french_horn', name: 'French Horn', category: 'brass', waveform: 'sawtooth', attack: 0.05, decay: 0.2, sustain: 0.6, release: 0.3, detune: 3, harmonics: [1, 0.5, 0.35, 0.2], filter: 2500, vibrato: 3.5 }, 40 { id: 'tuba', name: 'Tuba', category: 'brass', waveform: 'sawtooth', attack: 0.06, decay: 0.2, sustain: 0.6, release: 0.35, detune: 2, harmonics: [1, 0.8, 0.5, 0.3], filter: 1500 }, 41 { id: 'brass_section', name: 'Brass Section', category: 'brass', waveform: 'sawtooth', attack: 0.04, decay: 0.15, sustain: 0.7, release: 0.25, detune: 6, harmonics: [1, 0.6, 0.4, 0.25], filter: 4000 }, 42 { id: 'muted_trumpet', name: 'Muted Trumpet', category: 'brass', waveform: 'square', attack: 0.02, decay: 0.1, sustain: 0.5, release: 0.2, detune: 2, harmonics: [1, 0.4, 0.2], filter: 2000 }, 43 44 // === WOODWIND === 45 { id: 'flute', name: 'Flute', category: 'woodwind', waveform: 'sine', attack: 0.05, decay: 0.1, sustain: 0.7, release: 0.2, detune: 0, harmonics: [1, 0.2, 0.05], vibrato: 5 }, 46 { id: 'clarinet', name: 'Clarinet', category: 'woodwind', waveform: 'square', attack: 0.03, decay: 0.1, sustain: 0.7, release: 0.2, detune: 1, harmonics: [1, 0.0, 0.5, 0.0, 0.25], filter: 3000, vibrato: 4 }, 47 { id: 'oboe', name: 'Oboe', category: 'woodwind', waveform: 'sawtooth', attack: 0.02, decay: 0.1, sustain: 0.65, release: 0.15, detune: 2, harmonics: [1, 0.5, 0.3, 0.2], filter: 3500, vibrato: 5 }, 48 { id: 'bassoon', name: 'Bassoon', category: 'woodwind', waveform: 'sawtooth', attack: 0.04, decay: 0.15, sustain: 0.6, release: 0.25, detune: 2, harmonics: [1, 0.6, 0.4, 0.25], filter: 2000, vibrato: 3 }, 49 { id: 'alto_sax', name: 'Alto Saxophone', category: 'woodwind', waveform: 'sawtooth', attack: 0.02, decay: 0.1, sustain: 0.7, release: 0.2, detune: 3, harmonics: [1, 0.6, 0.35, 0.2], filter: 4000, vibrato: 4.5 }, 50 { id: 'tenor_sax', name: 'Tenor Saxophone', category: 'woodwind', waveform: 'sawtooth', attack: 0.025, decay: 0.12, sustain: 0.68, release: 0.22, detune: 3, harmonics: [1, 0.65, 0.4, 0.25], filter: 3000, vibrato: 4 }, 51 { id: 'soprano_sax', name: 'Soprano Saxophone', category: 'woodwind', waveform: 'sawtooth', attack: 0.015, decay: 0.08, sustain: 0.7, release: 0.18, detune: 3, harmonics: [1, 0.55, 0.3, 0.15], filter: 5000, vibrato: 5 }, 52 { id: 'recorder', name: 'Recorder', category: 'woodwind', waveform: 'sine', attack: 0.04, decay: 0.1, sustain: 0.6, release: 0.15, detune: 0, harmonics: [1, 0.15, 0.05] }, 53 { id: 'pan_flute', name: 'Pan Flute', category: 'woodwind', waveform: 'sine', attack: 0.08, decay: 0.15, sustain: 0.5, release: 0.3, detune: 0, harmonics: [1, 0.1] }, 54 55 // === PERCUSSION === 56 { id: 'kick', name: 'Kick Drum', category: 'percussion', waveform: 'sine', attack: 0.001, decay: 0.15, sustain: 0.0, release: 0.2, detune: 0, harmonics: [1], pitchEnv: -50 }, 57 { id: 'snare', name: 'Snare Drum', category: 'percussion', waveform: 'triangle', attack: 0.001, decay: 0.1, sustain: 0.0, release: 0.15, detune: 0, harmonics: [1, 0.5], noise: 0.8 }, 58 { id: 'hihat_closed', name: 'Hi-Hat (Closed)', category: 'percussion', waveform: 'square', attack: 0.001, decay: 0.05, sustain: 0.0, release: 0.05, detune: 0, harmonics: [1], noise: 1, filter: 8000 }, 59 { id: 'hihat_open', name: 'Hi-Hat (Open)', category: 'percussion', waveform: 'square', attack: 0.001, decay: 0.3, sustain: 0.1, release: 0.3, detune: 0, harmonics: [1], noise: 1, filter: 7000 }, 60 { id: 'tom_high', name: 'Tom (High)', category: 'percussion', waveform: 'sine', attack: 0.001, decay: 0.2, sustain: 0.0, release: 0.25, detune: 0, harmonics: [1, 0.3], pitchEnv: -20 }, 61 { id: 'tom_low', name: 'Tom (Low)', category: 'percussion', waveform: 'sine', attack: 0.001, decay: 0.3, sustain: 0.0, release: 0.35, detune: 0, harmonics: [1, 0.4], pitchEnv: -30 }, 62 { id: 'crash', name: 'Crash Cymbal', category: 'percussion', waveform: 'sawtooth', attack: 0.001, decay: 1.0, sustain: 0.2, release: 1.5, detune: 10, harmonics: [1, 0.8, 0.6], noise: 0.9, filter: 6000 }, 63 { id: 'ride', name: 'Ride Cymbal', category: 'percussion', waveform: 'triangle', attack: 0.001, decay: 0.5, sustain: 0.3, release: 0.8, detune: 5, harmonics: [1, 0.6], noise: 0.5, filter: 7000 }, 64 { id: 'clap', name: 'Hand Clap', category: 'percussion', waveform: 'triangle', attack: 0.001, decay: 0.08, sustain: 0.0, release: 0.1, detune: 0, harmonics: [1], noise: 0.9, filter: 2000 }, 65 { id: 'cowbell', name: 'Cowbell', category: 'percussion', waveform: 'square', attack: 0.001, decay: 0.3, sustain: 0.0, release: 0.3, detune: 0, harmonics: [1, 0.8], filter: 3500 }, 66 67 // === SYNTH === 68 { id: 'synth_lead', name: 'Synth Lead', category: 'synth', waveform: 'sawtooth', attack: 0.01, decay: 0.2, sustain: 0.6, release: 0.3, detune: 3, harmonics: [1, 0.5], filter: 5000 }, 69 { id: 'synth_pad', name: 'Synth Pad', category: 'synth', waveform: 'sawtooth', attack: 0.5, decay: 0.5, sustain: 0.8, release: 1.0, detune: 10, harmonics: [1, 0.4, 0.2], filter: 3000 }, 70 { id: 'synth_brass', name: 'Synth Brass', category: 'synth', waveform: 'sawtooth', attack: 0.03, decay: 0.15, sustain: 0.7, release: 0.2, detune: 5, harmonics: [1, 0.6, 0.3], filter: 4500 }, 71 { id: 'synth_strings', name: 'Synth Strings', category: 'synth', waveform: 'sawtooth', attack: 0.3, decay: 0.3, sustain: 0.7, release: 0.6, detune: 12, harmonics: [1, 0.5, 0.25], filter: 4000 }, 72 { id: 'square_lead', name: 'Square Lead', category: 'synth', waveform: 'square', attack: 0.01, decay: 0.1, sustain: 0.7, release: 0.2, detune: 0, harmonics: [1] }, 73 { id: 'pulse_lead', name: 'Pulse Lead', category: 'synth', waveform: 'square', attack: 0.005, decay: 0.15, sustain: 0.5, release: 0.25, detune: 2, harmonics: [1, 0.3], pwm: true }, 74 { id: 'fm_bell', name: 'FM Bell', category: 'synth', waveform: 'sine', attack: 0.001, decay: 1.0, sustain: 0.0, release: 1.5, detune: 0, harmonics: [1, 0.3, 0.1], fm: true }, 75 { id: 'chiptune', name: 'Chiptune', category: 'synth', waveform: 'square', attack: 0.001, decay: 0.05, sustain: 0.8, release: 0.05, detune: 0, harmonics: [1], filter: 8000 }, 76 { id: 'supersaw', name: 'Supersaw', category: 'synth', waveform: 'sawtooth', attack: 0.01, decay: 0.2, sustain: 0.7, release: 0.4, detune: 15, harmonics: [1, 1, 1, 1, 1], filter: 6000 }, 77 { id: 'ambient_pad', name: 'Ambient Pad', category: 'synth', waveform: 'sine', attack: 1.0, decay: 1.0, sustain: 0.9, release: 2.0, detune: 8, harmonics: [1, 0.3, 0.1], filter: 2000 }, 78 79 // === BASS === 80 { id: 'acoustic_bass', name: 'Acoustic Bass', category: 'bass', waveform: 'triangle', attack: 0.01, decay: 0.3, sustain: 0.4, release: 0.4, detune: 1, harmonics: [1, 0.5, 0.2] }, 81 { id: 'electric_bass', name: 'Electric Bass', category: 'bass', waveform: 'sawtooth', attack: 0.005, decay: 0.2, sustain: 0.5, release: 0.3, detune: 2, harmonics: [1, 0.6, 0.3], filter: 2500 }, 82 { id: 'synth_bass', name: 'Synth Bass', category: 'bass', waveform: 'sawtooth', attack: 0.005, decay: 0.15, sustain: 0.6, release: 0.2, detune: 3, harmonics: [1, 0.8, 0.4], filter: 3000 }, 83 { id: 'sub_bass', name: 'Sub Bass', category: 'bass', waveform: 'sine', attack: 0.02, decay: 0.2, sustain: 0.8, release: 0.3, detune: 0, harmonics: [1] }, 84 { id: 'slap_bass', name: 'Slap Bass', category: 'bass', waveform: 'triangle', attack: 0.001, decay: 0.1, sustain: 0.3, release: 0.2, detune: 2, harmonics: [1, 0.7, 0.5, 0.3], filter: 4000 }, 85 { id: 'fretless_bass', name: 'Fretless Bass', category: 'bass', waveform: 'triangle', attack: 0.02, decay: 0.25, sustain: 0.5, release: 0.35, detune: 1, harmonics: [1, 0.4, 0.2], vibrato: 3 }, 86 87 // === WORLD === 88 { id: 'sitar', name: 'Sitar', category: 'world', waveform: 'sawtooth', attack: 0.005, decay: 0.5, sustain: 0.3, release: 0.8, detune: 6, harmonics: [1, 0.7, 0.5, 0.4, 0.3], vibrato: 6, filter: 4000 }, 89 { id: 'koto', name: 'Koto', category: 'world', waveform: 'triangle', attack: 0.001, decay: 0.6, sustain: 0.1, release: 0.8, detune: 2, harmonics: [1, 0.4, 0.2] }, 90 { id: 'shamisen', name: 'Shamisen', category: 'world', waveform: 'sawtooth', attack: 0.001, decay: 0.2, sustain: 0.15, release: 0.3, detune: 3, harmonics: [1, 0.6, 0.4], filter: 4500 }, 91 { id: 'kalimba', name: 'Kalimba', category: 'world', waveform: 'sine', attack: 0.001, decay: 0.6, sustain: 0.0, release: 0.8, detune: 0, harmonics: [1, 0.3, 0.1] }, 92 { id: 'steel_drum', name: 'Steel Drum', category: 'world', waveform: 'sine', attack: 0.001, decay: 0.4, sustain: 0.1, release: 0.6, detune: 0, harmonics: [1, 0.5, 0.25], filter: 5000 }, 93 { id: 'bagpipe', name: 'Bagpipe', category: 'world', waveform: 'sawtooth', attack: 0.1, decay: 0.1, sustain: 0.95, release: 0.2, detune: 5, harmonics: [1, 0.8, 0.6, 0.4], filter: 2500, drone: true }, 94 { id: 'didgeridoo', name: 'Didgeridoo', category: 'world', waveform: 'sawtooth', attack: 0.1, decay: 0.2, sustain: 0.8, release: 0.3, detune: 3, harmonics: [1, 0.9, 0.7, 0.5], filter: 800 }, 95 { id: 'erhu', name: 'Erhu', category: 'world', waveform: 'sawtooth', attack: 0.08, decay: 0.2, sustain: 0.6, release: 0.3, detune: 4, harmonics: [1, 0.5, 0.3], filter: 3500, vibrato: 5.5 } 96]; 97 98/** 99 * Synthesizer Engine Class 100 */ 101class SynthesizerEngine { 102 constructor() { 103 this.audioContext = null; 104 this.masterGain = null; 105 this.reverbNode = null; 106 this.analyserWaveform = null; 107 this.analyserSpectrum = null; 108 this.activeVoices = new Map(); 109 this.selectedInstrument = INSTRUMENTS[0]; 110 this.currentOctave = 4; 111 this.masterVolume = 0.5; 112 this.reverbMix = 0.2; 113 this.consciousnessMod = 0.5; 114 this.sustainPedal = false; 115 this.sustainedNotes = new Set(); 116 117 this.init(); 118 } 119 120 async init() { 121 // Create audio context on first user interaction 122 if (!this.audioContext) { 123 this.audioContext = new (window.AudioContext || window.webkitAudioContext)(); 124 } 125 126 // Master gain 127 this.masterGain = this.audioContext.createGain(); 128 this.masterGain.gain.value = this.masterVolume; 129 130 // Analyzers 131 this.analyserWaveform = this.audioContext.createAnalyser(); 132 this.analyserWaveform.fftSize = 2048; 133 134 this.analyserSpectrum = this.audioContext.createAnalyser(); 135 this.analyserSpectrum.fftSize = 512; 136 137 // Create reverb 138 this.reverbNode = await this.createReverb(); 139 140 // Dry path 141 this.dryGain = this.audioContext.createGain(); 142 this.dryGain.gain.value = 1 - this.reverbMix; 143 144 // Wet path 145 this.wetGain = this.audioContext.createGain(); 146 this.wetGain.gain.value = this.reverbMix; 147 148 // Routing 149 this.masterGain.connect(this.dryGain); 150 this.masterGain.connect(this.reverbNode); 151 this.reverbNode.connect(this.wetGain); 152 153 this.dryGain.connect(this.analyserWaveform); 154 this.wetGain.connect(this.analyserWaveform); 155 156 this.analyserWaveform.connect(this.analyserSpectrum); 157 this.analyserSpectrum.connect(this.audioContext.destination); 158 } 159 160 async createReverb() { 161 const convolver = this.audioContext.createConvolver(); 162 const rate = this.audioContext.sampleRate; 163 const length = rate * 2; 164 const impulse = this.audioContext.createBuffer(2, length, rate); 165 166 for (let channel = 0; channel < 2; channel++) { 167 const data = impulse.getChannelData(channel); 168 for (let i = 0; i < length; i++) { 169 data[i] = (Math.random() * 2 - 1) * Math.pow(1 - i / length, 2); 170 } 171 } 172 173 convolver.buffer = impulse; 174 return convolver; 175 } 176 177 setMasterVolume(value) { 178 this.masterVolume = value; 179 if (this.masterGain) { 180 this.masterGain.gain.value = value; 181 } 182 } 183 184 setReverbMix(value) { 185 this.reverbMix = value; 186 if (this.dryGain && this.wetGain) { 187 this.dryGain.gain.value = 1 - value; 188 this.wetGain.gain.value = value; 189 } 190 } 191 192 setConsciousnessMod(value) { 193 this.consciousnessMod = value; 194 } 195 196 selectInstrument(instrumentId) { 197 const instrument = INSTRUMENTS.find(i => i.id === instrumentId); 198 if (instrument) { 199 this.selectedInstrument = instrument; 200 return instrument; 201 } 202 return null; 203 } 204 205 setOctave(octave) { 206 this.currentOctave = Math.max(1, Math.min(8, octave)); 207 } 208 209 noteToFrequency(note, octave = this.currentOctave) { 210 const noteMap = { 'C': 0, 'C#': 1, 'D': 2, 'D#': 3, 'E': 4, 'F': 5, 'F#': 6, 'G': 7, 'G#': 8, 'A': 9, 'A#': 10, 'B': 11 }; 211 const semitone = noteMap[note]; 212 if (semitone === undefined) return 440; 213 return 440 * Math.pow(2, (semitone - 9 + (octave - 4) * 12) / 12); 214 } 215 216 playNote(note, octave = this.currentOctave, velocity = 0.8) { 217 if (!this.audioContext) this.init(); 218 if (this.audioContext.state === 'suspended') { 219 this.audioContext.resume(); 220 } 221 222 const freq = typeof note === 'number' ? note : this.noteToFrequency(note, octave); 223 const noteId = `${note}-${octave}`; 224 225 // Stop existing note 226 this.stopNote(note, octave, true); 227 228 const inst = this.selectedInstrument; 229 const voices = []; 230 const time = this.audioContext.currentTime; 231 232 // Apply consciousness modulation 233 const conscMod = 1 + (this.consciousnessMod - 0.5) * 0.2; 234 235 // Create oscillators for harmonics 236 const harmonics = inst.harmonics || [1]; 237 harmonics.forEach((harmAmp, idx) => { 238 if (harmAmp <= 0) return; 239 240 const osc = this.audioContext.createOscillator(); 241 osc.type = inst.waveform; 242 243 // Frequency with detuning 244 const harmFreq = freq * (idx + 1); 245 const detuneCents = (inst.detune || 0) * (Math.random() - 0.5) * 2; 246 osc.frequency.value = harmFreq * conscMod; 247 osc.detune.value = detuneCents; 248 249 // Gain for this harmonic 250 const harmGain = this.audioContext.createGain(); 251 harmGain.gain.value = 0; 252 253 // Optional filter 254 let filterNode = null; 255 if (inst.filter) { 256 filterNode = this.audioContext.createBiquadFilter(); 257 filterNode.type = 'lowpass'; 258 filterNode.frequency.value = inst.filter * conscMod; 259 filterNode.Q.value = 1; 260 osc.connect(filterNode); 261 filterNode.connect(harmGain); 262 } else { 263 osc.connect(harmGain); 264 } 265 266 harmGain.connect(this.masterGain); 267 268 // ADSR Envelope 269 const attack = inst.attack || 0.01; 270 const decay = inst.decay || 0.1; 271 const sustain = (inst.sustain || 0.5) * harmAmp * velocity; 272 const release = inst.release || 0.3; 273 274 // Attack 275 harmGain.gain.setValueAtTime(0, time); 276 harmGain.gain.linearRampToValueAtTime(harmAmp * velocity, time + attack); 277 // Decay to sustain 278 harmGain.gain.linearRampToValueAtTime(sustain, time + attack + decay); 279 280 // Pitch envelope for percussion 281 if (inst.pitchEnv) { 282 osc.frequency.setValueAtTime(harmFreq * 2, time); 283 osc.frequency.exponentialRampToValueAtTime(harmFreq, time + 0.05); 284 } 285 286 // Vibrato 287 if (inst.vibrato) { 288 const lfo = this.audioContext.createOscillator(); 289 const lfoGain = this.audioContext.createGain(); 290 lfo.frequency.value = inst.vibrato; 291 lfoGain.gain.value = freq * 0.01; 292 lfo.connect(lfoGain); 293 lfoGain.connect(osc.frequency); 294 lfo.start(time); 295 voices.push({ node: lfo, type: 'lfo' }); 296 } 297 298 osc.start(time); 299 voices.push({ node: osc, gain: harmGain, filter: filterNode, type: 'osc', sustain, release }); 300 }); 301 302 // Add noise for percussion 303 if (inst.noise && inst.noise > 0) { 304 const bufferSize = this.audioContext.sampleRate * 0.5; 305 const noiseBuffer = this.audioContext.createBuffer(1, bufferSize, this.audioContext.sampleRate); 306 const output = noiseBuffer.getChannelData(0); 307 for (let i = 0; i < bufferSize; i++) { 308 output[i] = Math.random() * 2 - 1; 309 } 310 311 const noiseSource = this.audioContext.createBufferSource(); 312 noiseSource.buffer = noiseBuffer; 313 314 const noiseGain = this.audioContext.createGain(); 315 noiseGain.gain.value = 0; 316 317 const noiseFilter = this.audioContext.createBiquadFilter(); 318 noiseFilter.type = 'highpass'; 319 noiseFilter.frequency.value = inst.filter || 4000; 320 321 noiseSource.connect(noiseFilter); 322 noiseFilter.connect(noiseGain); 323 noiseGain.connect(this.masterGain); 324 325 const attack = inst.attack || 0.001; 326 const decay = inst.decay || 0.1; 327 const sustain = inst.noise * velocity * 0.3; 328 const release = inst.release || 0.1; 329 330 noiseGain.gain.setValueAtTime(0, time); 331 noiseGain.gain.linearRampToValueAtTime(inst.noise * velocity * 0.5, time + attack); 332 noiseGain.gain.linearRampToValueAtTime(sustain, time + attack + decay); 333 334 noiseSource.start(time); 335 voices.push({ node: noiseSource, gain: noiseGain, type: 'noise', sustain, release }); 336 } 337 338 this.activeVoices.set(noteId, voices); 339 return noteId; 340 } 341 342 stopNote(note, octave = this.currentOctave, immediate = false) { 343 const noteId = `${note}-${octave}`; 344 const voices = this.activeVoices.get(noteId); 345 346 if (!voices) return; 347 348 // If sustain pedal is on and not immediate, add to sustained notes 349 if (this.sustainPedal && !immediate) { 350 this.sustainedNotes.add(noteId); 351 return; 352 } 353 354 const time = this.audioContext.currentTime; 355 356 voices.forEach(voice => { 357 if (voice.gain) { 358 const release = voice.release || 0.3; 359 voice.gain.gain.cancelScheduledValues(time); 360 voice.gain.gain.setValueAtTime(voice.gain.gain.value, time); 361 voice.gain.gain.linearRampToValueAtTime(0, time + release); 362 363 if (voice.node) { 364 voice.node.stop(time + release + 0.1); 365 } 366 } else if (voice.type === 'lfo' && voice.node) { 367 voice.node.stop(time + 0.5); 368 } 369 }); 370 371 setTimeout(() => { 372 this.activeVoices.delete(noteId); 373 }, 1000); 374 } 375 376 setSustainPedal(on) { 377 this.sustainPedal = on; 378 if (!on) { 379 // Release all sustained notes 380 this.sustainedNotes.forEach(noteId => { 381 const [note, octave] = noteId.split('-'); 382 this.stopNote(note, parseInt(octave), false); 383 }); 384 this.sustainedNotes.clear(); 385 } 386 } 387 388 playTestNote(instrumentId) { 389 const prevInst = this.selectedInstrument; 390 this.selectInstrument(instrumentId); 391 392 const inst = INSTRUMENTS.find(i => i.id === instrumentId); 393 let testNote = 'C'; 394 let testOctave = 4; 395 396 // Adjust for bass instruments 397 if (inst.category === 'bass') { 398 testOctave = 2; 399 } else if (inst.category === 'percussion') { 400 testOctave = 3; 401 } 402 403 this.playNote(testNote, testOctave, 0.7); 404 405 setTimeout(() => { 406 this.stopNote(testNote, testOctave); 407 this.selectedInstrument = prevInst; 408 }, 500); 409 } 410 411 getWaveformData() { 412 if (!this.analyserWaveform) return new Uint8Array(128); 413 const data = new Uint8Array(this.analyserWaveform.frequencyBinCount); 414 this.analyserWaveform.getByteTimeDomainData(data); 415 return data; 416 } 417 418 getSpectrumData() { 419 if (!this.analyserSpectrum) return new Uint8Array(64); 420 const data = new Uint8Array(this.analyserSpectrum.frequencyBinCount); 421 this.analyserSpectrum.getByteFrequencyData(data); 422 return data; 423 } 424 425 stopAll() { 426 this.activeVoices.forEach((voices, noteId) => { 427 const [note, octave] = noteId.split('-'); 428 this.stopNote(note, parseInt(octave), true); 429 }); 430 this.sustainedNotes.clear(); 431 } 432} 433 434// Export 435window.INSTRUMENTS = INSTRUMENTS; 436window.SynthesizerEngine = SynthesizerEngine; 437