BeatBoxing is a type of vocal percussion, where musicians use their lips, cheeks, and throat to create different beats. It is commonly used by hiphop and rap artists. In this paper, we explore the use of BeatBoxing as a query mechanism for music information retrieval and more speci£cally the retrieval of drum loops. A classi£cation system that automatically identi£es the individual beat boxing sounds and can map them to corresponding drum sounds has been developed. In addition, the tempo of BeatBoxing is automatically detected and used to dynamically browse a database of music. We also describe some experiments in extracting structural representations of rhythm and their use for style classi£cation of drum loops.