CALMUS (Calculated Music, 1988-2009) is a computer program that is designed for musical composition for traditional instruments. It is specially constructed for contemporary music and deals with musical problems that occur in this music, providing Artificial Intelligence functions and options to handle them.

Kjartan Olafsson started developing CALMUS in 1988 - as a part of his doctoral studies (Mus.Lis.) at the Sibelius Academy in Finland (grad. 1995) - and continued as a independent research project for musical composition.

Among works composed with CALMUS are pieces for solo instruments, chamber ensembles, electronic music, multimedia works, orchestral works, concertos and music for various theatre productions and short films. The Viola concerto by Kjartan Olafsson composed with CALMUS received the Icelandic Music Award in 2002 as the best composition of the year. www.mic.is www.listir.is/lambda/Lambda.html

CALMUS music has been performed in Europe and USA at various music festivals such as Nordic Music Days, ISCM - International Society for Contemporary music, Avanti summer festival in Finland, Dark Music Days in Iceland, ICMC - International Computer Music Festival, and the Reykjavík Arts Festival.

Music with CALMUS has been released on several CD's. www.listir.is/calmus/Kjartan.net/ - www.mic.is

Since 1988 Kjartan has given numerous lectures on algorithms and artificial Intelligence in musical composition at such venues as the Sibelius Academy in Finland, ICMC International Computer Music Festival, EMS – Electro-Acoustic Music institute in Sweden, The Norwegian Academy of Music, New York University, Instituto Quazar and Conservatorio Santa Cecilia in Rome and the University of Iceland.

CALMUS is written in Macintosh Common Lisp with the Common Lisp Object oriented Support, CLOS and runs on all computers in the PowerPC Macintosh series both with system 9 and X (Leopard).