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为你的 Fedora 系统增添发音功能

编译自　|　https://fedoramagazine.org/add-speech-fedora-system/ 
　作者　|　Alessio Ciregia
　译者　|　lujun9972
Fedora 工作站默认带有一个小软件，叫做 espeak。它是一个声音合成器 —— 也就是转换文本为声音的软件。
在当今这个世界，发音设备已经非常普遍了。在智能电话、Amazon Alexa，甚至火车站的公告栏中都有声音合成器。而且，现在合成声音已经跟人类的声音很类似了。我们生活在 80bandaid 的科幻电影里！
与前面提到的这些工具相比，espeak 的发音听起来有一点原始。但最终 espeak 可以产生不错的发音效果。而且不管你觉得它有没有用，至少它可以给你带来一些乐趣。
运行 espeak
你可以在命令行为 espeak 设置各种参数。包括：
◈ 振幅（-a）
◈ 音高调整 （-p）
◈ 读句子的速度 （-s）
◈ 单词间的停顿时间 （-g）
每个选项都能产生不同的效果，你可以通过调整它们来让发音更加清晰。
你也可以通过命令行选项来选择不同的变音。比如，-ven+m3 表示另一种英式男音，而 -ven+f1 表示英式女音。你也可以尝试其他语言的发音。运行下面命令可以查看支持的语言列表：
    

  1. espeak --voices
    2.
要注意，很多非英语的语言发音现在还处于实验阶段。
若要创建相应的 WAV 文件而不是真的讲出来，则可以使用 -w 选项：
    

  1. espeak -w out.wav "Audio file test"
    2.
espeak 还能读出文件的内容。
    

  1. espeak -f plaintextfile
    2.
你也可以通过标准输入传递要发音的文本。举个简单的例子，通过这种方式，你可以创建一个发音盒子，当事件发生时使用声音通知你。你的备份完成了？将下面命令添加到脚本的最后试试效果：
    

  1. echo "Backup completed" | espeak -s 160 -a 100 -g 4
    2.
假如有日志文件中出现错误了：
    

  1. tail -1F /your/log/file | grep --line-buffered 'ERROR' | espeak
    2.
或者你也可以创建一个报时钟表，每分钟报一次时：
    

  1. while true; do date +%S | grep '00' && date +%H：%M | espeak; sleep 1; done
    2.
你会发现，espeak 的使用场景仅仅受你的想象所限制。享受你这会发音的 Fedora 系统吧！
via: https://fedoramagazine.org/add-speech-fedora-system/
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