Sonic Annotator is a utility program for batch feature extraction from audio files. It runs Vamp audio analysis plugins on audio files and can write the result features in a selection of formats, in particular as RDF using the Audio Features and Event ontologies. A somewhat experimental first public release (0.1) is now available. For more details and for downloads, please see http://www.omras2.org/SonicAnnotator Sonic Annotator was developed at the Centre for Digital Music, Queen Mary, University of London. It was funded by the EPSRC through the OMRAS2 project and is Free Software published under the GNU General Public License. Chris