痞子衡嵌入式：语音处理工具pzh-speech诞生记（1）- 环境搭建(Python2.7.14 + PyAudio0.2.11 + Matplotlib2.2.3 + SpeechRecognition3.8.1 + pyttsx3 2.7)

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　　大家好，我是痞子衡，是正经搞技术的痞子。今天痞子衡给大家介绍的是语音处理工具pzh-py-speech诞生之环境搭建。

　　在写pzh-py-speech时需要先搭好开发环境，下表列出了开发过程中会用到的所有软件/工具包：

一、涉及工具列表

工具	功能	下载地址
Python 2.7.14	Python官方包（解释器）	https://www.python.org/
PyAudio 0.2.11	跨平台开源Audio I/O库 PortAudio 的Python封装	http://people.csail.mit.edu/hubert/pyaudio/
Matplotlib 2.2.3	一款非常强大的Python 2D绘图库	https://matplotlib.org/ https://github.com/matplotlib/matplotlib
NumPy 1.15.0	基础Python科学计算包	http://www.numpy.org/ https://www.scipy.org/
SpeechRecognition 3.8.1	一款支持多引擎的Python语音识别（ASR）库	https://github.com/Uberi/speech_recognition
PocketSphinx 0.1.15	卡内基-梅隆大学开源语音识别引擎 CMU Sphinx 的Python封装	https://github.com/bambocher/pocketsphinx-python https://pypi.org/project/pocketsphinx/
pyttsx3 2.7	pyTTS, pyttsx项目的延续之作，一款轻量级的Python文语合成引擎	https://github.com/nateshmbhat/pyttsx3 https://pypi.org/project/pyttsx3/
eSpeak 1.48.04	一款开源的TTS，可将转换结果保存为wav	http://espeak.sourceforge.net/
wxPython 4.0.3	跨平台开源GUI库 wxWidgets 的Python封装库	https://www.wxpython.org/ https://pypi.org/project/wxPython/
wxFormBuilder 3.8.0	wxPython GUI界面构建工具	https://github.com/wxFormBuilder/wxFormBuilder
PyCharm Community 2018.02	一款流行的Python集成开发环境	http://www.jetbrains.com/pycharm/

二、基础环境搭建（Python + PyAudio + Matplotlib + NumPy）

　　pzh-py-speech工具是一个完全基于Python语言开发的应用软件，首先安装好Python 2.7.14，痞子衡的安装目录为C: ools_mcuPython27，安装完成后确保系统环境变量里包括该路径（C: ools_mcuPython27），因为该路径下包含python.exe，后续python命令需调用这个python.exe完成的。此外pip是Python的包管理工具，我们可以借助pip来安装PyAudio和Matplotlib包（NumPy含在Matplotlib里）：

PS C: ools_mcuPython27Scripts> .pip.exe install pyaudio

Collecting pyaudio
 Downloading https://files.pythonhosted.org/packages/94/3e/430d4e4e24e89b19c1df052644f69e03d64c1ae2e83f5a14bd365e0236de/PyAudio-0.2.11-cp27-cp27m-win_amd64.whl (52kB)
Installing collected packages: pyaudio
Successfully installed pyaudio-0.2.11

PS C: ools_mcuPython27Scripts> .pip.exe install matplotlib

Collecting matplotlib
  Downloading https://files.pythonhosted.org/packages/f7/5b/4bc804df462961a3f0d138243611ce24b7899db04e6043e46df0ff1080e9/matplotlib-2.2.3-cp27-cp27m-win_amd64.whl (8.4MB)
Collecting backports.functools-lru-cache (from matplotlib)
  Downloading https://files.pythonhosted.org/packages/03/8e/2424c0e65c4a066e28f539364deee49b6451f8fcd4f718fefa50cc3dcf48/backports.functools_lru_cache-1.5-py2.py3-none-any.whl
Requirement already satisfied, skipping upgrade: six>=1.10 in c:	ools_mcupython27libsite-packages (from matplotlib) (1.11.0)
Collecting pytz (from matplotlib)
  Downloading https://files.pythonhosted.org/packages/30/4e/27c34b62430286c6d59177a0842ed90dc789ce5d1ed740887653b898779a/pytz-2018.5-py2.py3-none-any.whl (510kB)
Collecting cycler>=0.10 (from matplotlib)
  Downloading https://files.pythonhosted.org/packages/f7/d2/e07d3ebb2bd7af696440ce7e754c59dd546ffe1bbe732c8ab68b9c834e61/cycler-0.10.0-py2.py3-none-any.whl
Collecting kiwisolver>=1.0.1 (from matplotlib)
  Downloading https://files.pythonhosted.org/packages/e0/3a/2fda27dacdfafcf8f40cce2be09890b1443af3e65c3ab8f7294216a2946b/kiwisolver-1.0.1-cp27-none-win_amd64.whl (64kB)
Collecting python-dateutil>=2.1 (from matplotlib)
  Downloading https://files.pythonhosted.org/packages/cf/f5/af2b09c957ace60dcfac112b669c45c8c97e32f94aa8b56da4c6d1682825/python_dateutil-2.7.3-py2.py3-none-any.whl (211kB)
Collecting pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=2.0.1 (from matplotlib)
  Downloading https://files.pythonhosted.org/packages/6a/8a/718fd7d3458f9fab8e67186b00abdd345b639976bc7fb3ae722e1b026a50/pyparsing-2.2.0-py2.py3-none-any.whl (56kB)
Collecting numpy>=1.7.1 (from matplotlib)
  Downloading https://files.pythonhosted.org/packages/3d/d6/f04730ad69240be04584b3979dcd2f0b25f9e58463547df6fcafa139c567/numpy-1.15.0-cp27-none-win_amd64.whl (13.5MB)
Requirement already satisfied, skipping upgrade: setuptools in c:	ools_mcupython27libsite-packages (from kiwisolver>=1.0.1->matplotlib) (28.8.0)
Installing collected packages: backports.functools-lru-cache, pytz, cycler, kiwisolver, python-dateutil, pyparsing, numpy, matplotlib
Successfully installed backports.functools-lru-cache-1.5 cycler-0.10.0 kiwisolver-1.0.1 matplotlib-2.2.3 numpy-1.15.0 pyparsing-2.2.0 python-dateutil-2.7.3 pytz-2018.5

　　有了PyAudio便可以读写Audio，有了Matplotlib便可以将Audio以波形方式图形化显示出来。这两个工具安装完成，JaysPySPEECH工具开发的Python基础环境便搭好了。

Note: 关于GUI及调试等相关工具（wxPython、wxFormBuilder、PyCharm）的安装详见痞子衡另一个作品 tinyPyCOM的环境搭建。

二、高级环境搭建（SpeechRecognition + PocketSphinx + pyttsx3 + eSpeak）

　　上一步主要安装了pzh-py-speech的基础开发环境，用于Audio的录播与显示，但是pzh-py-speech设计之初便考虑支持语音识别、文语转换功能，因为我们还需要进一步安装相关Python库。
　　首先安装语音识别库，SpeechRecognition是一款非常流行的支持多引擎的语音识别Python库，痞子衡为pzh-py-speech选用的就是SpeechRecognition，其中语音识别引擎选用的是可以离线工作的PocketSphinx，具体安装如下：

PS C: ools_mcuPython27Scripts> .pip.exe install SpeechRecognition

Collecting SpeechRecognition
  Downloading https://files.pythonhosted.org/packages/26/e1/7f5678cd94ec1234269d23756dbdaa4c8cfaed973412f88ae8adf7893a50/SpeechRecognition-3.8.1-py2.py3-none-any.whl (32.8MB)
Installing collected packages: SpeechRecognition
Successfully installed SpeechRecognition-3.8.1

PS C: ools_mcuPython27Scripts> python -m pip install --upgrade pip setuptools wheel

Requirement already up-to-date: pip in c:	ools_mcupython27libsite-packages (18.0)
Collecting setuptools
  Downloading https://files.pythonhosted.org/packages/66/e8/570bb5ca88a8bcd2a1db9c6246bb66615750663ffaaeada95b04ffe74e12/setuptools-40.2.0-py2.py3-none-any.whl (568kB)
Collecting wheel
  Downloading https://files.pythonhosted.org/packages/81/30/e935244ca6165187ae8be876b6316ae201b71485538ffac1d718843025a9/wheel-0.31.1-py2.py3-none-any.whl (41kB)
Installing collected packages: setuptools, wheel
  Found existing installation: setuptools 28.8.0
    Uninstalling setuptools-28.8.0:
      Successfully uninstalled setuptools-28.8.0
Successfully installed setuptools-40.2.0 wheel-0.31.1

PS C: ools_mcuPython27Scripts> .pip.exe install --upgrade pocketsphinx

Collecting pocketsphinx
  Downloading https://files.pythonhosted.org/packages/38/d3/192476022e989377ab00cb84fb0b18790e400bbd58e464155c58cb4622f8/pocketsphinx-0.1.15-cp27-cp27m-win_amd64.whl (29.1MB)
Installing collected packages: pocketsphinx
Successfully installed pocketsphinx-0.1.15

　　最后安装文语合成库，pyttsx3是一款超轻量级的文语合成Python库，其是经典的pyTTS、pyttsx项目的延续，其内核为Microsoft Speech API (SAPI5)，可离线工作，具体安装如下：

PS C: ools_mcuPython27Scripts> .pip.exe install pyttsx3

Collecting pyttsx3
  Downloading https://files.pythonhosted.org/packages/24/4e/580726c73272344d3e74b7aaffae55ff6b6450061fbecb8cc6e112531c02/pyttsx3-2.7.tar.gz
Requirement already satisfied: pypiwin32 in c:	ools_mcupython27libsite-packages (from pyttsx3) (223)
Requirement already satisfied: pywin32>=223 in c:	ools_mcupython27libsite-packages (from pypiwin32->pyttsx3) (223)
Building wheels for collected packages: pyttsx3
  Running setup.py bdist_wheel for pyttsx3 ... done
  Stored in directory: C:Users
xa07314AppDataLocalpipCachewheelsa28afe11112aca9c89142c3a404bc67ef3393a7ad530da26639a05d4
Successfully built pyttsx3
Installing collected packages: pyttsx3
Successfully installed pyttsx3-2.7

　　pyttsx3仅能在线发声，无法保存到wav文件，因此我们还需要一个可以保存wav文件的TTS，痞子衡选择了eSpeak，其具体安装详见系列第六篇。到了这里，pzh-py-speech工具开发的Python环境便全部搭好了。

　　至此，语音处理工具pzh-py-speech诞生之环境搭建痞子衡便介绍完毕了，掌声在哪里~~~

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