一、關於pyaudio的安裝
現在pyaudio的版本爲：PyAudio v0.2.9，若想安裝其他版本，請參考以下鏈接:http://people.csail.mit.edu/hubert/pyaudio/packages/1、Windows 用戶：
通過pip安裝：
python -m pip install pyaudio
2、Mac OS X 用戶：
利用Homebrew安裝portaudio，然後通過pip安裝pyaudio：
brew install portaudio
pip install pyaudio
沒有安裝過Homebrew的用戶可通過在終端中輸入：ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" 進行安裝，若有相關疑問可參考以下鏈接：http://brew.sh（Homebrew和Pyaudio的安裝需要事先安裝過Xcode的ComandLineTools）
相關鏈接：http://people.csail.mit.edu/hubert/pyaudio/#downloads
二、關於pyaudio的使用
爲方便大家，列舉簡單的播放錄製的使用方法，這些代碼在以上的鏈接裏均可找到，同時還有其他的一些功能的代碼實例，在這裏我不一一列舉。
Play：
"""PyAudio Example: Play a WAVE file."""
import pyaudio
import wave
import sys
CHUNK = 1024
if len(sys.argv) < 2:
print("Plays a wave file.\n\nUsage: %s filename.wav" % sys.argv[0])
sys.exit(-1)
wf = wave.open(sys.argv[1], 'rb')
p = pyaudio.PyAudio()
stream = p.open(format=p.get_format_from_width(wf.getsampwidth()),channels=wf.getnchannels(),rate=wf.getframerate(),output=True)
data = wf.readframes(CHUNK)
while data != '':
stream.write(data)
data = wf.readframes(CHUNK)
stream.stop_stream()
stream.close()
p.terminate()
Record：
"""PyAudio example: Record a few seconds of audio and save to a WAVE file."""
import pyaudio
import wave
CHUNK = 1024
FORMAT = pyaudio.paInt16
CHANNELS = 2
RATE = 44100
RECORD_SECONDS = 5
WAVE_OUTPUT_FILENAME = "output.wav"
p = pyaudio.PyAudio()
stream = p.open(format=FORMAT,
channels=CHANNELS,
rate=RATE,
input=True,
frames_per_buffer=CHUNK)
print("* recording")
frames = []
for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)):
data = stream.read(CHUNK)
frames.append(data)
print("* done recording")
stream.stop_stream()
stream.close()
p.terminate()
wf = wave.open(WAVE_OUTPUT_FILENAME, 'wb')
wf.setnchannels(CHANNELS)
wf.setsampwidth(p.get_sample_size(FORMAT))
wf.setframerate(RATE)
wf.writeframes(b''.join(frames))
wf.close()
三、關於聲音錄製的應用
之前有在python上做聊天室以及通訊功能的實例，其中利用到pyaudio進行聲音的錄製，對代碼進行了簡單修改。爲了便於存儲及識別，採用了將文件名命名爲時間的形式，同時利用了全局變量JUDGE進行錄製結束的判斷。代碼中的NOW與FILENAME用於存儲錄製時間及錄製文件名，便於引用。本實例的最長錄製時間爲30s，使用時可根據個人需求更改TIME的值以達到修改最長錄製時間的目的。使用時，先調用recorder中的函數record_wave，然後在錄製結束時將recorder中的全局變量JUDGE置爲False，即可完成錄製。以下爲recorder.py的源代碼：
#!usr/bin/env python
#coding=utf-8
import numpy as np
from pyaudio import PyAudio,paInt16
from datetime import datetime
import wave
from Tkinter import *
#define of params
NUM_SAMPLES = 2000
framerate = 8000
channels = 1
sampwidth = 2
#the longest record time
TIME = 30
FILENAME = ''
NOW = ''
SAVE = ''
JUDGE = True
def save_wave_file(filename, data):
'''save the date to the wav file'''
wf = wave.open(filename, 'wb')
wf.setnchannels(channels)
wf.setsampwidth(sampwidth)
wf.setframerate(framerate)
wf.writeframes("".join(data))
wf.close()
def record_wave():
#open the input of wave
pa = PyAudio()
stream = pa.open(format = paInt16, channels = 1,rate = framerate, input = True,frames_per_buffer = NUM_SAMPLES)
save_buffer = []
count = 0
global JUDGE
while JUDGE and count<TIME*4:
#read NUM_SAMPLES sampling data
string_audio_data = stream.read(NUM_SAMPLES)
save_buffer.append(string_audio_data)
count += 1
print "."
now = datetime.now().strftime("%Y-%m-%d_%H_%M_%S")
filename = now +".wav"
SAVE = save_wave_file(filename, save_buffer)
save_buffer = []
print filename, "saved"
global FILENAME, NOW, JUDGE
FILENAME = filename
NOW = now