Audio files contain digitized sound.

声音文件中包含数字化的声音。

Notice that all of the audio files have a.caf extension.

注意文件的格式是。caf。

Do you want to joining a lot of audio files into one file?

你想不想加入了很多的音频文件到一个文件？

The Music directory contains the user's music and audio files.

音乐文件夹用于存放用户的音乐和音频文件。