python - 将音频信号分成小样本

Question

我正在尝试处理音频信号并将音频信号分成N个离散样本，然后我想独立播放这些样本。

如何使用python做到这一点？

Answer 1

 import wave
 import pygame
 import time



def slice(infile, outfilename, start_ms, end_ms):
    width = infile.getsampwidth() #Returns sample width in bytes
    rate = infile.getframerate()  #Returns sampling frequency
    fpms = rate / 1000 # frames per ms
    length = (end_ms - start_ms) * fpms
    start_index = start_ms * fpms

    out = wave.open(outfilename, "w")
    out.setparams((infile.getnchannels(), width, rate, length, infile.getcomptype(), infile.getcompname()))

    infile.rewind()             #Rewind the file pointer to the beginning of the audio stream
    anchor = infile.tell()      #Return current file pointer position
    infile.setpos(anchor + start_index)  #Set the file pointer to the specified position
    out.writeframes(infile.readframes(length)) #Write audio frames and make sure nframes is correct


if __name__ == "__main__":

     slice(wave.open("song1.wav", "r"), "out.wav", 500, 5000)

     pygame.mixer.init()
     pygame.mixer.music.load("out.wav")
     pygame.mixer.music.play()
     while pygame.mixer.music.get_busy() == True:
           continue