我完全利用开源的免费软件生成剧本，该软件使用的是Festival TTS引擎和它提供的一些有特色的声音。

I generated this play entirely with open source and free software, and it USES the Festival TTS engine with some of the distinctive voices it provides.

youdao

在编辑声音效果的时候，我还用到了一个免费的程序，Audacity，这样可以让声音更加搭配游戏。

I also used a free sound-editing program called Audacity to edit the sounds to fit my game.

youdao

它甚至可以跟踪温度、运动、声音和光，包括达100视频上吹笛者的免费云存储存储。

It will even track temperature, motion, sound and light and includes storage of up to 100 videos on Piper's free cloud storage.

youdao

So this was a bit of joke and surprise made them angry about this convergence. Then something even worse happened. People started to talk about using the internet to carry voice conversations for free.

所以这有种开玩笑和惊奇的意味,使他们对聚合很生气，而后更,糟糕的事发生了，人们开始谈论关于,使用互联网免费传输声音会话。

麻省理工公开课 - 媒体、教育、市场课程节选