One of Ruggles's most important works. Under its original title of invention for Orchestra, it so impressed Varèse with its counterpoint that Varése suggested the new title Organum as a reference to the ancient style of counterpoint. Ruggles also prepared a 2-piano version along with the original orchestration. John Kirkpatrick arranged a solo piano version under Ruggles's supervision. First published in New Music Edition in 1947, it is now published in this corrected and newly engraved edition,...