Renowned German composer Peter Michael Hamel turned his focus to the pipe organ for his dramatic composition, Organum. The fourpart score is based on the medieval music form, the organum. In Latin, the term organum has two meanings it either refers to the organ or to the polyphonic Gregorian chant. Hamel combines the two meanings as he masterfully performs on the grand pipe organ at the Academy of Music in Munich, his instrument taking the place of the human voice. The polyphonic form of organum came to its height in 12th century Paris, with composers associated with the Notre Dame Cathedral. Their settings contained contrasting sections voices rhythmically patterned, discantus style, alternating with sections in which the chant notes were prolonged to accommodate the many notes sung above them, organal style. Hamel incorporates these contrasting sections in the four parts of Organum, an inspired and moving performance by this artist and composer.