python调用pyaudio使用麦克风录制wav声音文件的教程

#!/usr/bin/python3# -*- coding: utf-8 -*-from pyaudio import PyAudio, paInt16 import numpy as np from datetime import datetime import waveclass recoder:  NUM_SAMPLES = 2000   #pyaudio内置缓冲大小  SAMPLING_RATE = 8000  #取样频率  LEVEL = 500     #声音保存的阈值  COUNT_NUM = 20   #NUM_SAMPLES个取样之内出现COUNT_NUM个大于LEVEL的取样则记录声音  SAVE_LENGTH = 8     #声音记录的最小长度：SAVE_LENGTH * NUM_SAMPLES 个取样  TIME_COUNT = 60   #录音时间，单位s  Voice_String = []  def savewav(self,filename):    wf = wave.open(filename, 'wb')     wf.setnchannels(1)     wf.setsampwidth(2)     wf.setframerate(self.SAMPLING_RATE)     wf.writeframes(np.array(self.Voice_String).tostring())     # wf.writeframes(self.Voice_String.decode())    wf.close()   def recoder(self):    pa = PyAudio()     stream = pa.open(format=paInt16, channels=1, rate=self.SAMPLING_RATE, input=True,       frames_per_buffer=self.NUM_SAMPLES)     save_count = 0     save_buffer = []     time_count = self.TIME_COUNT    while True:      time_count -= 1      # print time_count      # 读入NUM_SAMPLES个取样      string_audio_data = stream.read(self.NUM_SAMPLES)       # 将读入的数据转换为数组      audio_data = np.fromstring(string_audio_data, dtype=np.short)      # 计算大于LEVEL的取样的个数      large_sample_count = np.sum( audio_data > self.LEVEL )      print(np.max(audio_data))      # 如果个数大于COUNT_NUM，则至少保存SAVE_LENGTH个块      if large_sample_count > self.COUNT_NUM:        save_count = self.SAVE_LENGTH       else:         save_count -= 1      if save_count < 0:        save_count = 0       if save_count > 0 :       # 将要保存的数据存放到save_buffer中        #print save_count > 0 and time_count >0        save_buffer.append( string_audio_data )       else:       #print save_buffer      # 将save_buffer中的数据写入WAV文件，WAV文件的文件名是保存的时刻        #print "debug"        if len(save_buffer) > 0 :           self.Voice_String = save_buffer          save_buffer = []           print("Recode a piece of voice successfully!")          return True      if time_count==0:         if len(save_buffer)>0:          self.Voice_String = save_buffer          save_buffer = []           print("Recode a piece of voice successfully!")          return True        else:          return Falseif __name__ == "__main__":  r = recoder()  r.recoder()  r.savewav("test.wav")