Vorbis is an open-source audio compression format developed by the Xiph.Org Foundation. It is designed to provide high-quality sound while maintaining a smaller file size compared to other formats like MP3. Vorbis is often used in streaming audio applications and is compatible with various media players. One of the key features of Vorbis is its ability to adapt to different bit rates, allowing users to choose the quality of audio they prefer. It supports multi-channel audio and is commonly used in video games and online music services, making it a versatile choice for audio encoding.