11. XHR èªã¿è¾¼ã¿ var xhr = new XMLHttpRequest(); xhr.onload = function (e) { // data: xhr.response } xhr.open('GET', âhttp://example.com/sound.m4aâ, true); xhr.responseType = 'arraybuffer'; xhr.send(); 12. AudioContext AudioBuffer ç»å ´äººç©(1) ãµã¦ã³ãå ¨ä½ã管ç é常1ã¤ã³ã¹ã¿ã³ã¹ã ãä½æ audio asset AudioBufferãã³ãã¼ããé³æºã½ã¼ã¹ ã¤ã³ã¹ã¿ã³ã¹æ°ã«å¶éãã var AudioContext = window.webkitAudioContext || window.AudioContext; var ctx = new AudioConte
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