This book constitutes the thoroughly refereed post-proceedings of the 8th International Symposium on Computer Music Modeling and Retrieval, CMMR 2011 and the 20th International Symposium on Frontiers of Research in Speech and Music, FRSM 2011. This year the 2 conferences merged for the first time and were held in Bhubanes, India, in March 2011. The 17 revised full papers presented were specially reviewed and revised for inclusion in this proceedings volume. The book is divided in four main chapters which reflect the high quality of the sessions of CMMR 2011, the collaboration with FRSM 2011 and the Indian influence, in the topics of Indian Music, Music Information Retrieval, Sound analysis synthesis and perception and Speech processing of Indian languages.

Computer Music Modeling and Retrieval 2009 was the sixth event of this - ternational conference series that was initiated in 2003. Since the start, this conference has been co-organized by the University of Aalborg, Esbjerg, D- mark (http: //www. aaue. dk) and the Laboratoire de M ecanique et d'Acoustique inMarseille, France(http: //www. lma. cnrs-mrs. fr)andhastakenplaceinFrance, ItalyandDenmark. The?vepreviouseditionsofCMMRo?eredavariedoverview of recent years' music information retrieval and sound modeling activities in addition to alternative ?elds related to human interaction, perception and c- nition, as well as philosophical aspects linked to the ?eld. We believe that the strength and the originality of this international conference both lie in its mul- disciplinary concept and its ability to permanently evolve and open for new trends and directions within the related ?elds of interest. This year's CMMR took place in Copenhagen, Denmark, May 18-22, 2009 and was associated with theInternationalConferenceonAuditoryDisplay(http: //www. icad. org), hereby introducing new topics related to sound design, soni?cation and augmented - ality to the computer music modeling and retrieval community."

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 (http://www.aaue.dk), the Laboratoire de M' ecanique et d'Acoustique, CNRS in Marseille, France (http:/www.lma.cn- mrs.fr) and the Network for Cross-Disciplinary Studies of Music and Meaning, University of Southern Denmark (http://www.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.