CMMR is an annual event focusing on important aspects of computer music. CMMR 2008 was the ?fth event in this series and was co-organized by A- borg University Esbjerg, Denmark (aaue.dk), the Laboratoire de M¿ ecanique et d'Acoustique, CNRS in Marseille, France (http:/lma.cn- mrs.fr) and the Network for Cross-Disciplinary Studies of Music and Meaning, University of Southern Denmark (ntsmb.dk/). The conference was held in Copenhagen, May 19-23, 2008. The four previous editions of CMMR gathered a large number of notew- thy papers by researchers from the ?eld of computer music. The proceedings of these conferences were published in the Lecture Notes in Computer Science series (LNCS 2771, LNCS 3310, LNCS 3902 and LNCS 4969). The present e- tion follows the lineage of the previous ones, including a collection of 21 papers specially reviewed and corrected for this proceedings volume. The ?eld of computer music embraces a large number of research areas that span from information retrieval, programming, arti?cial intelligence to aco- tics, signal processing and sound modeling. In the last CMMR gatherings an increased emphasis was placed on the role of human interaction at all levels of musicalpractice,aswellasperceptualandcognitiveaspects inorderto establish relationsbetweenthestructureofsoundsandtheirimpactonhumanbeings.The identi?cation of perceptually relevant sound structures is linked to the notion of the sense of sounds, which was the title of the CMMR 2007 conference.

Retrieving the Meaning.- Timbre Perception of Sounds from Impacted Materials: Behavioral, Electrophysiological and Acoustic Approaches.- Perception of Harmonic and Inharmonic Sounds: Results from Ear Models.- Semantic Contours in Tracks Based on Emotional Tags.- Chunking Sound for Musical Analysis.- Towards a Model of Musical Chunks.- Does Social Interaction Activate Music Listeners?.- Musically Meaningful or Just Noise? An Analysis of On-line Artist Networks.- The Pursuit of Happiness in Music: Retrieving Valence with Contextual Music Descriptors.- Perception of Impacted Materials: Sound Retrieval and Synthesis Control Perspectives.- Refinement Strategies for Music Synchronization.- Labelling the Structural Parts of a Music Piece with Markov Models.- Tree Representation in Combined Polyphonic Music Comparison.- Interval Distinction on Melody Perception for Music Information Retrieval.- A Learning-Based Model for Musical Data Representation Using Histograms.- Generating the Meaning: Tools and Performance.- Ontological Substance and Meaning in Live Electroacoustic Music.- Dynamic Mapping Strategies for Expressive Synthesis Performance and Improvisation.- Amplified Breath - (Dis)Embodied Habitat: Exploring Sonic Interfaces of Performance, Electronics, Space and Flautist Identity.- KSQuant - Complex Score Manipulation in PWGL through Quantization.- Strategies and Methods for Creating Symbolic Electroacoustic Scores in ENP.- An IEEE 1599-Based Interface for Score Analysis.- New Music in the Atomic Age.