我已经为音频频谱分析器https://github.com/markjay4k/Audio-Spectrum-Analyzer-in-Python/blob/master/audio%20spectrum_pt2_spectrum_analyzer.ipynb设置了python音频流和fft(我删除了所有绘图代码),我想从fft中找到最突出的频率
import numpy as np
import pyaudio
import struct
from scipy.fftpack import fft
import sys
import time
class AudioStream(object):
def __init__(self):
# stream constants
self.CHUNK = 1024 * 2
self.FORMAT = pyaudio.paInt16
self.CHANNELS = 1
self.RATE = 44100
self.pause = False
# stream object
self.p = pyaudio.PyAudio()
self.stream = self.p.open(
format=self.FORMAT,
channels=self.CHANNELS,
rate=self.RATE,
input=True,
output=True,
frames_per_buffer=self.CHUNK,
)
self.start_recording()
def start_recording(self):
print('stream started')
while True:
#Get data from stream and unpack to data_int
data = self.stream.read(self.CHUNK)
data_int = struct.unpack(str(2 * self.CHUNK) + 'B', data)
# compute FFT
yf = fft(data_int)
# find the most prominent frequency from this fft
if __name__ == '__main__':
AudioStream()
下面是github上非自适应音频频谱分析仪输出的屏幕截图,显示了我希望从fft(最突出频率)中获得的值。在这种情况下,该值约为1555Hz
我发现一些代码使用问题Audio Frequencies in Python实现了这一点,我将把它放在下面:
如果yf是fft的结果,那么您需要找到其中的最大值,对吗?如果它是一个numpy数组,那么amax()函数将在这里帮助您@DarrylG为你指出了正确的方向Print highest peak value of the frequency domain plot
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