QuickTime

source:http://unity3d.com/unity/features/asset-importing

Audio Support
Unity can import any audio format that is supported by QuickTime. Audio can be internally converted and distributed as Ogg Vorbis, for keeping down your game's published file size.

音頻 支援
Unity由Quicktime的輔助之下能夠導入其他不同版本的音頻，音頻可以在內部轉換和Ogg Vorbis的分配，
持了你的遊戲公佈的文件大小。