FFT로 직접 음악 분석
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참고문헌
- https://evan-moon.github.io/2019/07/10/javascript-audio-waveform/
- https://evan-moon.github.io/2019/08/21/javascript-audio-effectors-practice/
- https://ko.wikipedia.org/wiki/이산_푸리에_변환
- https://data-make.tistory.com/264
- https://antimatter15.com/2015/05/cooley-tukey-fft-dct-idct-in-under-1k-of-javascript/
- developer.mozilla.org/en-US
- https://developer.mozilla.org/en-US/docs/Web/API/BaseAudioContext/createScriptProcessor