如何读出 mp3 文件的值？

Question

Music is just a modulation of a sine wave, therefore it must have a "y"-value at any given time. In mp3 files, the standard sampling frequency is 44100Hz and therefore has a "y"-value once every 44100th of a second. But how can You read these values out? Preferably in Python3.

Answer 1

Thought this won't read mp3 directly from Python, I'd suggest first converting mp3 to wav, and then reading wav from Python.

Install mpg123 if you don't have it:

sudo apt-get install mpg123

Then convert the file like this:

mpg123 -w file_out.wav file_in.mp3

Or use ffmpeg:

ffmpeg -i file_in.mp3 file_out.wav 

Then, try scipy.io.wavfile.read to read the wav file.