python - PyAudio - 多 channel 管理\去混音

Question

我要计算这段代码的单 channel 数据(为了计算 channel 1和 channel 4之间的音频互相关):

import time
import numpy as np
import pyaudio
import scipy
from scipy import signal, fftpack

pyaud = pyaudio.PyAudio()


#open the stream

stream = pyaud.open(
    format = pyaudio.paInt16,
    channels = 4,
    rate = 16000,
    input_device_index = 4,
    output = False,
    input = True,
    frames_per_buffer=2048,)


while True:

    rawsamps = stream.read(2048)        
    samps = np.fromstring(rawsamps, dtype=np.int16)
    frames_per_buffer_length = len(samps) / 4 #(channels)   
    assert frames_per_buffer_length == int(frames_per_buffer_length)    
    samps = np.reshape(samps, (frames_per_buffer_length, 4)) #4 channels

假设原始数据是交错的。
这是我需要使用的功能:

    signal.correlate(n1, n2, mode='full')

如何为每个 channel 创建一个数据数组以便使用相关函数？代码的最后几行是否正确？

谢谢

Answer 1

我找到了答案，使用 print loudness(samps[:,0]), loudness(samps[:,3])。它在外壳中打印“mic 1 loudness , mic 4 loudness”