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| 1 | +// Web Audio API sound synthesis for dougk |
| 2 | + |
| 3 | +let audioContext = null |
| 4 | + |
| 5 | +function getContext() { |
| 6 | + if (!audioContext) { |
| 7 | + audioContext = new (window.AudioContext || window.webkitAudioContext)() |
| 8 | + } |
| 9 | + return audioContext |
| 10 | +} |
| 11 | + |
| 12 | +// Damp crunch sound - wet bread being chomped |
| 13 | +export function playMonch() { |
| 14 | + const ctx = getContext() |
| 15 | + const now = ctx.currentTime |
| 16 | + |
| 17 | + // Resume context if suspended (browser autoplay policy) |
| 18 | + if (ctx.state === 'suspended') { |
| 19 | + ctx.resume() |
| 20 | + } |
| 21 | + |
| 22 | + // Create noise buffer for the crunch texture |
| 23 | + const noiseLength = 0.15 |
| 24 | + const bufferSize = ctx.sampleRate * noiseLength |
| 25 | + const noiseBuffer = ctx.createBuffer(1, bufferSize, ctx.sampleRate) |
| 26 | + const noiseData = noiseBuffer.getChannelData(0) |
| 27 | + |
| 28 | + // Fill with noise |
| 29 | + for (let i = 0; i < bufferSize; i++) { |
| 30 | + noiseData[i] = Math.random() * 2 - 1 |
| 31 | + } |
| 32 | + |
| 33 | + // Noise source |
| 34 | + const noise = ctx.createBufferSource() |
| 35 | + noise.buffer = noiseBuffer |
| 36 | + |
| 37 | + // Low-pass filter for the "damp" wet quality |
| 38 | + const dampFilter = ctx.createBiquadFilter() |
| 39 | + dampFilter.type = 'lowpass' |
| 40 | + dampFilter.frequency.setValueAtTime(800, now) |
| 41 | + dampFilter.frequency.exponentialRampToValueAtTime(300, now + 0.08) |
| 42 | + dampFilter.Q.value = 2 |
| 43 | + |
| 44 | + // Bandpass for crunch character |
| 45 | + const crunchFilter = ctx.createBiquadFilter() |
| 46 | + crunchFilter.type = 'bandpass' |
| 47 | + crunchFilter.frequency.value = 400 |
| 48 | + crunchFilter.Q.value = 1.5 |
| 49 | + |
| 50 | + // Envelope for the noise burst |
| 51 | + const noiseGain = ctx.createGain() |
| 52 | + noiseGain.gain.setValueAtTime(0, now) |
| 53 | + noiseGain.gain.linearRampToValueAtTime(0.4, now + 0.01) // Quick attack |
| 54 | + noiseGain.gain.exponentialRampToValueAtTime(0.15, now + 0.04) // Initial drop |
| 55 | + noiseGain.gain.exponentialRampToValueAtTime(0.01, now + 0.12) // Tail off |
| 56 | + |
| 57 | + // Low thump for the bite impact |
| 58 | + const thump = ctx.createOscillator() |
| 59 | + thump.type = 'sine' |
| 60 | + thump.frequency.setValueAtTime(120, now) |
| 61 | + thump.frequency.exponentialRampToValueAtTime(50, now + 0.06) |
| 62 | + |
| 63 | + const thumpGain = ctx.createGain() |
| 64 | + thumpGain.gain.setValueAtTime(0, now) |
| 65 | + thumpGain.gain.linearRampToValueAtTime(0.3, now + 0.005) |
| 66 | + thumpGain.gain.exponentialRampToValueAtTime(0.01, now + 0.08) |
| 67 | + |
| 68 | + // Secondary squelch - adds wetness |
| 69 | + const squelch = ctx.createOscillator() |
| 70 | + squelch.type = 'triangle' |
| 71 | + squelch.frequency.setValueAtTime(200, now) |
| 72 | + squelch.frequency.exponentialRampToValueAtTime(80, now + 0.05) |
| 73 | + |
| 74 | + const squelchGain = ctx.createGain() |
| 75 | + squelchGain.gain.setValueAtTime(0, now + 0.01) |
| 76 | + squelchGain.gain.linearRampToValueAtTime(0.15, now + 0.02) |
| 77 | + squelchGain.gain.exponentialRampToValueAtTime(0.01, now + 0.07) |
| 78 | + |
| 79 | + // Master output with slight compression feel |
| 80 | + const master = ctx.createGain() |
| 81 | + master.gain.value = 0.6 |
| 82 | + |
| 83 | + // Connect noise chain |
| 84 | + noise.connect(dampFilter) |
| 85 | + dampFilter.connect(crunchFilter) |
| 86 | + crunchFilter.connect(noiseGain) |
| 87 | + noiseGain.connect(master) |
| 88 | + |
| 89 | + // Connect thump |
| 90 | + thump.connect(thumpGain) |
| 91 | + thumpGain.connect(master) |
| 92 | + |
| 93 | + // Connect squelch |
| 94 | + squelch.connect(squelchGain) |
| 95 | + squelchGain.connect(master) |
| 96 | + |
| 97 | + // Output |
| 98 | + master.connect(ctx.destination) |
| 99 | + |
| 100 | + // Play |
| 101 | + noise.start(now) |
| 102 | + noise.stop(now + noiseLength) |
| 103 | + thump.start(now) |
| 104 | + thump.stop(now + 0.1) |
| 105 | + squelch.start(now) |
| 106 | + squelch.stop(now + 0.08) |
| 107 | +} |
