window.AudioContext = window.AudioContext || window.webkitAudioContext;

const audioContext = new AudioContext();

​

​

const drawAudio = url => {

    fetch(url)

        .then(response => response.arrayBuffer())

        .then(arrayBuffer => audioContext.decodeAudioData(arrayBuffer))

        .then(audioBuffer => filterData(audioBuffer));

};

​

const filterData = audioBuffer => {

    const rawData = audioBuffer.getChannelData(0);

    console.log(rawData);

​

};

​

drawAudio('https://983yqbz442.s3.amazonaws.com/andyc.mp3');