Super-Spherical Wave Simulation in Flaring Horns

The International Digital ElectroAcoustic Music Archive (IDEAMA) was created to collect, preserve and disseminate historically significant electroacoustic music. It was co-founded in December, 1990, by Stanford University's Center for Computer Research in Music and Acoustics (CCRMA), and by the Center for Art and Media Technology (ZKM), in Karlsruhe, Germany. Technology for digital sound and text storage and retrieval has been implemented at both locations. This paper describes various phases in the creation of the IDEAMA and plans for its dissemination. The hardware and software used to author and access the IDEAMA's various disk formats are also discussed. I. Phase One Setting up Shop: Administrative Structure Boards An international advisory board of renowned composers was formed to help establish the international scope and reputation of the archive. To identify, locate and choose materials for the target collection, CCRMA and ZKM each formed a selection committee comprised of eminent composers, musicologists and other individuals who are well-versed and active in the field. There are three types of IDEAMA institutions: founding institutions (ZKM and CCRMA), partner and affiliate institutions. The founding institutions have collaborated to establish policies and procedures for creating the archive and its ongoing function. The partner institutions have participated in the formation of the archive, in most cases by contributing materials. They will eventually house the archive, as will the affiliate branches. Branches Presently, there are eight formally designated partner institutions: The New York Public Library; the National Center for Science Information Systems (NACSIS) in Tokyo; IRCAM and INA/GRM in Paris; GMEB in Bourges; EMS in Sweden; the IPEM at the University of Ghent, Belgium; and most recently, the Instituut voor Sonologie, of the Konijiklink Conservatory in the Hague, Netherland II. Phase II Creating the Target Collection CCRMA and ZKM are jointly responsible for collecting archive materials on a regional basis: ZKM focuses on European electroacoustic music, while CCRMA is responsible for music from the Americas, Asia and Australia. The original analog tapes for targeted works, composed between 1940 and 1970, have existed in a number of archives, radio stations, studios and private collections. Over two hundred works have been acquired by CCRMA, and approximately 320 European works are now being processed at ZKM. ZKM Selections Sources for the European works include numerous major centers such as INA/GRM Paris; WDR Kbln; EMS Stockholm, Experimental Studio Warszaw and the former Studio di Fonologia , Milano. In addition, works from smaller studios and private collections, and from the estate of Hermann Heiss have

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