Yoyo Belimbau's live audio comes from a microphone built into Yoyo. This microphone is also used by the imitative software which mutes the mic when YoYo plays. The stream is in OGG Vorbis format, a free open-source file format. The file you download here is a metafile or playlist file, which provides a link to the streaming audio server and the correct audio data stream. To see a list of OGG Vorbis players and other software, visit the OGG Vorbis Download page. Many free media players support OGG: Winamp for Windows. VLC Media Player for Mac, Windows, Linux. Quicktime with plugin. Real Player with plugin. Zinf player for Windows and Linux.