Sørensen studied composition with Ib Nørholm at the Royal Danish Academy of Music and with Per Nørgård at the Jutland Music Academy. Sørensen's mature works create a sense of decay that is emotionally similar to viewing an aging visual artwork. There is a sense of compromised beauty. Sørensen achieves this by treating major/minor tonalities with microtonal inflections and blurring the harmonies with glissandi. Examples of this technique can be found in his trombone concerto "Birds and Bells", a work for orchestra and choir "Echoing Garden", and his violin concerto "Sterbende Gärten", which took the prestigious Nordic Music Prize in 1996. His early works deal with folksong in prosaic way. Sørensen has composed in a variety of mediums, including orchestra, choir, chamber ensemble and solo instruments, but notably he has not composed any electroacoustic music. Per Nørgård (b. ... Microtonal music is music using microtones -- intervals of less than a semitone, or as Charles Ives put it, the notes between the cracks of the piano. ... Orchestra at City Hall (Edmonton). ... A choir or chorus is a musical ensemble of singers. ... Electroacoustic music is a type of music which originated in the late 1940s, and early 1950s. ...