Circadia is an album of works by contemporary American composer Andrew Rudin. It features his pieces Portrait Miniatures: Three Women; A Sudden Waking; Sonata for Piano; Ephemera; Circadia. Rudin's reputation was established in the 1960's through his association with Robert Moog and a pioneering series of synthesized compositions, most notably his Nonesuch album, Tragoedia. Throughout the 1970's many of his compositions were theatrical in nature, involving collaborations with ballet and modern dance, film, television, and incidental music for the stage. A number of these works blended electronically synthesized sound with traditional instruments and voices. The 1980's saw the completion of his full-evening opera Three Sisters, on a libretto by William Ashbrook from the play by Chekhov, as well as many works for traditional instruments, both orchestral and chamber music. After his graduation from The University of Pennsylvania, where he studied primarily with George Rochberg, he joined the faculty of The Philadelphia Musical Academy, remaining there for the next thirty-seven years, as it eventually became part of the present University of the Arts. Since his retirement in 200l he has worked as a broadcaster for WWFM, The Classical Network from Mercer County Community College, and served on the board of directors for Philadelphia's Orchestra 2001.