It is our pleasure to announce that CLAM [1] has won the 2006 ACM Open Source Multimedia Contest. CLAM is an open-source C++ framework for doing research and application development in the audio and music domain. It offers a conceptual model for audio systems, a repository of processing algorithms, data types, and tools , as well as applications for analysis, synthesis and processing of audio signals. These features can be exploited to build cross-platform applications or to build rapid prototypes. CLAM is coordinated by Xavier Amatriain at the University of California Santa Barbara but is mostly developed at the Universitat Pompeu Fabra in Barcelona (Spain) by a team led by Pau Arumi and David Garcia. CLAM is now being developed thanks to a grant from the STSI at the Catalan Government (Generalitat de Catalunya). According to the jury: "CLAM is a remarkably comprehensive system with impressive capabilities". The award will be presented in the forthcoming ACM Multimedia Conference [2]. The ACM Open Source Competition is a prestigious international contest that is now in its third year. Last year, for instance, the award was given to the OpenVidia library for GPU accelerated Computer Vision [3]. This award culminates 5 years of ongoing research and development and the authors wish to thank all the past developers as well as all of our users and people who have given support throughout these years. The CLAM development team. [1] http://www.clam.iua.upf.edu [2] http://www.mmdb.ece.ucsb.edu/acmmm06/ [3] http://openvidia.sourceforge.net/