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我想打印音乐文件中存在的单独频率。如果频率放大器 比阈值更大。那么它会沾染。来自音乐的单独频率
import pyaudio
import wave
import numpy as np
chunk = 2048
wf = wave.open('/home/pi/music.wav', 'rb')
swidth = wf.getsampwidth()
RATE = wf.getframerate()
window = np.blackman(chunk)
p = pyaudio.PyAudio()
stream = p.open(format =
p.get_format_from_width(wf.getsampwidth()),
channels = wf.getnchannels(),
rate = RATE,
output = True)
data = wf.readframes(chunk)
while len(data) != '':
stream.write(data)
indata = np.array(wave.struct.unpack("%dh"%(len(data)/swidth),\
data))
fftdata=abs(np.fft.rfft(indata))**2
freq1=np.fft.fftfreq(len(indata))
for i in range(len(freq1)):
freq = freq1[i]
print freq
data = wf.readframes(chunk)
它是打印频率0.something。没有获得实际的频率
改变的代码,但不显示在赫兹适当的频率。 –