I suggest changing audio file to .ogg, the mp3 file has a lot of inaudible noises and has lower dB overall. Also the loading time for .ogg is much shorter than the mp3 due to it being lighter in size
.mp3 https://i.imgur.com/8Y3mUy5.png
.ogg https://i.imgur.com/9ZskguZ.png
I see that you're using the FLAC ver and convert it to mp3, but it's better to use .ogg instead
https://drive.google.com/uc?id=10atX9gzWaKh9f4dL42qR_K4Q4b8ox-fL