Aivars Kalējs (1951) is the most importany living Latvian composer.
He is a concert organist at the Dome Cathedral in Riga and chief organist for the New St. Gertrudes Lutheran Church. Aivars Kalējs has written more than 100 opuses of symphonic, organ, piano, chamber and choir music. His pieces such as Toccata on the Chorale "Allein Gott in der Höh sei Ehr", "Songs of Innocence" and Lux aeterna'' have been played in concerts around the world and have won several composition awards (e.g., symphonic work "Musica Dolente" - dedicated to the victims of the tragic events of September 11, 2001). His works are included in many CD's of the great musicians and collectives (e.g., Iveta Apkalna, Latvian National Symphony Orchestra).
The hypnotic Perpetuum Mobile was written in 2016.