pythonscipy库wave_python–SciPywavfile：音乐输入,垃圾输出？

通过一些额外的转换,您可以将24位WAV文件与标准库中的wave模块一起使用.

import wave

import numpy as np

from contextlib import closing

def pcm24to32(data, nchannels&＃61;1):

temp &＃61; np.zeros((len(data) / 3, 4), dtype&＃61;&＃39;b&＃39;)

temp[:, 1:] &＃61; np.frombuffer(data, dtype&＃61;&＃39;b&＃39;).reshape(-1, 3)

return temp.view(&＃39;

def pcm2float(sig, dtype&＃61;np.float64):

sig &＃61; np.asarray(sig) # make sure it&＃39;s a NumPy array

assert sig.dtype.kind &＃61;&＃61; &＃39;i&＃39;, "&＃39;sig&＃39; must be an array of signed integers!"

dtype &＃61; np.dtype(dtype) # allow string input (e.g. &＃39;f&＃39;)

# Note that &＃39;min&＃39; has a greater (by 1) absolute value than &＃39;max&＃39;!

# Therefore, we use &＃39;min&＃39; here to avoid clipping.

return sig.astype(dtype) / dtype.type(-np.iinfo(sig.dtype).min)

with closing(wave.open(&＃39;my_24bit_input.wav&＃39;)) as w:

framerate &＃61; w.getframerate()

nframes &＃61; w.getnframes()

nchannels &＃61; w.getnchannels()

width &＃61; w.getsampwidth()

data &＃61; w.readframes(nframes)

assert width &＃61;&＃61; 3

pcm &＃61; pcm24to32(data, nchannels)

# You can also use np.float64, if you prefer:

normalized &＃61; pcm2float(pcm, np.float32)

当然,您也可以使用scikits.audiolab,但请注意当使用除np.float64以外的类型时,目前(版本0.11.0)存在错误(https://github.com/cournape/audiolab/issues/3)&＃xff01;