Question

我有一个USB麦克风和覆盆子pi。这就是我想要做的。

我有一个“ music.wav”文件，其中的音轨设置为左声道，并且我有USB麦克风连接到了树莓派。

当我播放“ music.wav”并用麦克风讲话时，我可以听到左扬声器中的音乐，而左，右扬声器中的麦克风声音。

我尝试了以下代码，并尝试了不同的方法，无法实现将声音限制在正确的扬声器中。

有人可以帮助我如何使用python语言限制仅左讲话者的音乐和仅右讲话者的语音吗？

以下两个扬声器中来自麦克风的语音代码。仅需要限制在正确的扬声器中。请帮忙！

import pyaudio
import os
import numpy as np

chunk=2800
RATE=44100

p=pyaudio.PyAudio()

#input stream setup
stream=p.open(format = pyaudio.paInt16,rate=RATE,channels=1, 
input_device_index = 1, input=True, frames_per_buffer=chunk)

#the code below is from the pyAudio library documentation referenced 
#below
#output stream setup
player=p.open(format = pyaudio.paInt16,rate=RATE,channels=1, 
output=True, frames_per_buffer=chunk)

while True:            #Used to continuously stream audio
   try:
       data=np.fromstring(stream.read(chunk,exception_on_overflow 
       =False),dtype=np.int16)
       player.write(data,chunk)
   except IOError:
       continue

#closes streams
stream.stop_stream()
stream.close()
p.terminate

更新：经过多次尝试，我执行了以下代码：现在声音不清晰，我仍然在同时听两个扬声器...我也将“ player”（输出）的输出通道更改为2.。不走运！

import pyaudio
import os
import numpy as np

  
chunk=2800
RATE=44100

p=pyaudio.PyAudio()

#input stream setup
stream=p.open(format = pyaudio.paInt16,rate=RATE,channels=1, 
input_device_index = 1, input=True, frames_per_buffer=chunk)

player=p.open(format = pyaudio.paInt16,rate=RATE,channels=1, 
output=True, 
frames_per_buffer=chunk) #tried changing channels=2

while True:            #Used to continuously stream audio
   try:
      data=np.fromstring(stream.read(chunk,exception_on_overflow = 
      False),dtype=np.int16)    
      chunk_length = int(len(data)/2)           
      result = np.reshape(data, (chunk_length, 2),order='f')
      #result = np.reshape(data, (chunk_length, 2))  
      print(result)

      rightchannel=result[:, 1] #I need right
      #leftchannel=result[:, 0]
   
      print(rightchannel)
      player.write(rightchannel,chunk_length)
      #player.write(result,chunk)
  except IOError:
      continue

更新2：

stream=p.open(format = pyaudio.paInt16,rate=RATE,channels=1, 
input_device_index = 1, input=True, frames_per_buffer=chunk)
player=p.open(format = pyaudio.paInt16,rate=RATE,channels=2, 
output=True, 
frames_per_buffer=chunk)

while True:            #Used to continuously stream audio
   try:
      data=np.fromstring(stream.read(chunk,exception_on_overflow = 
      False),dtype=np.int16)    
      chunk_length = int(len(data)/2)           
      result = np.reshape(data, (chunk_length, 2))     
      print(result)
      rightchannel=result[:, 1] #I need right
      #leftchannel=result[:, 0]      
      print(rightchannel)
      player.write(rightchannel,chunk)      
  except IOError:
      continue
 
  **ERROR**>>>>
  [[185 179]
  [183 175]
  [190 197]
  ..., 
  [156 156]
  [149 144]
  [145 146]]
  [179 175 197 ..., 156 144 146]
  Traceback (most recent call last):
  File 
  "/home/pi/RKR_MainAudioBase/Audio_GUI_RKR/MicFuncFiles/recorder.py", 
  line 25, in <module>
  player.write(rightchannel,chunk)
  File "/usr/lib/python3/dist-packages/pyaudio.py", line 586, in write
  exception_on_underflow)
  ValueError: ndarray is not C-contiguous

Answer 1

经过大量研究和发现，我得出的解决方案：

当您将输入数组通道设为1时，它起作用。输入数据= [1 2 3 4 5 6]例如，从流中读取此单声道，以使立体声仅使输出播放器channel = 2并将数据输入dataout = [1 1 2 2 3 3 4 4 5 5 6 6]此格式为[L0 R0 L1 R1 ... etc]。然后是“ player.write（dataout，chunk）”。

要控制右声道，请将第2、4、6等位置元素设为0 ex：dataout = [1 0 2 0 3 0 4 0 5 0 6 0] 并为< strong>左声道将第1、3、5个元素设为0。dataout = [0 1 0 2 0 3 0 4 0 5 0 6]

这工作得很好！!!!

如何使用树莓派python播放左扬声器中的音乐和右扬声器中的麦克风声音？

1 个答案: