python 波形文件读取问题，为什么两种读取结果不一样

Question

t = np.linspace(0,0.06,256)
sig = np.sin(50*np.pi*t)+np.sin(100*2*np.pi*t)+np.sin(250*2*np.pi*t)

sig输出结果是类似[0.00000000e+00 5.45494864e-01 1.03893792e+00 1.43493658e+00...]
但是从波形文件里面读取
f=wave.open(“test.wav”,'rb')
params = f.getparams()
nchannels, sampwidth, framerate, nframes = params[:4]

wavefile = f.readframes(nframes)

wave_data = np.fromstring(wavefile, dtype = np.short)
输出wave_data的值则是，[ 0 7940 15384 ..., 31997 30888 27848]怎么让波形文件能读取到前面类似sig的值啊

Answer 1

最好都用字符串等方式读取，然后再来判断，直接浮点数，有不同的精度，表达方式等