3 Tidhar, D. Fazekas, G. Kolozali, S. Sandler, M. 2009 10th International Conference on Music Information Retrieval, Kobe, Japan 26/10/2009 We describe the process of collecting, organising and publishing a large set of music similarity features produced by the SoundBite playlist generator tool. These data can be a valuable asset in the development and evaluation of new Music Information Retrieval algorithms. They can also be used in Web-based music search and retrieval applications. For this reason, we make a database of features available on the Semantic Web via a SPARQL end-point, which can be used in Linked Data services. We provide examples of using the data in a research tool, as well as in a simple web application which responds to audio queries and finds a set of similar tracks in our database.