ループについて詳しく調べる

[AyatoYoshizawa]

`const audioContext = new (window.AudioContext || window.webkitAudioContext)();

const introSource = audioContext.createBufferSource(); const loopSource = audioContext.createBufferSource(); const gainNode = audioContext.createGain(); const convolver = audioContext.createConvolver();

// Set gain gainNode.gain.setValueAtTime(1, audioContext.currentTime);

// Load audio buffers let introBuffer, loopBuffer, reverbBuffer;

// Load intro fetch('intro.mp3') .then(response => response.arrayBuffer()) .then(data => audioContext.decodeAudioData(data)) .then(buffer => { introBuffer = buffer; introSource.buffer = introBuffer; introSource.connect(convolver); convolver.connect(gainNode).connect(audioContext.destination); introSource.start(); });

// Load loop fetch('loop.mp3') .then(response => response.arrayBuffer()) .then(data => audioContext.decodeAudioData(data)) .then(buffer => { loopBuffer = buffer; loopSource.buffer = loopBuffer; loopSource.loop = true; });

// Load reverb impulse response fetch('reverb-impulse-response.wav') .then(response => response.arrayBuffer()) .then(data => audioContext.decodeAudioData(data)) .then(buffer => { reverbBuffer = buffer; convolver.buffer = reverbBuffer; });

// Play loop after intro ends introSource.onended = function() { loopSource.connect(convolver); convolver.connect(gainNode).connect(audioContext.destination); loopSource.start(); }; `