in 1963 (active until 1970), with Julie Winter Sounds Out of Silent Spaces in 1972 (active until 1979) and with Barbara Benary and Daniel Goode, Gamelan Son of Lion in 1976 (still active). Works Corner became interested in calligraphy during military service in Korea in 1960–1961 and studied it with Ki-sung Kim; it is often incorporated into his scores. While there he became enamored with Korean traditional music, particularly the jeongak composition Sujecheon, which he describes as "the most beautiful piece of music in the history of the world." Many of his scores are open-ended in that some elements are specified, but others are left partially or entirely to the discretion of the performers. Some employ standard notation, whereas others are graphic scores, text scores, etc. His music also frequently explores unintentional sound, chance activities, minimalism, and non-Western instruments and tuning systems. Improvisation is important, though not exclusive; some "performance proposals" lead to a kind of ecstatic semi-trance. Contact with artists in other media, especially dance and the visual arts, as well as a long-standing interest in Eastern religions such as Zen Buddhism and study of the music of composers from the Baroque and Pre-Baroque eras, has likewise impacted his music. Representative works include the ensemble pieces Passionate Expanse of the Law, Sang-teh/Situations and Through the Mysterious Barricade, among many others. Also in his incredibly large oeuvre are piano pieces (perfect, Pictures of Pictures from Pictures of Pictures), choral works (Peace, be still), electronic music (the war cantata Oracle), and more than 400 works in the Gamelan series, to mention only some of his catalogue. He divides his output into five periods, each one reflective of his attitudes at the time: Culture, 1950s The World, 1960s and 1970s Mind, 1970s and 1980s Body, 1980s and 1990s Spirit; Soul, 1999–present Frog Peak Music, a Composer's Collective, has undertaken to make as much as possible of his opera omnia available by on-order photocopy publication. Non-musical activities In addition to his work as a composer and musician, he has created numerous assemblages, calligraphy, collages, drawings, and paintings, many of which have been exhibited internationally. He has also written much poetry, which like some of his music, has occasionally appeared under his Korean pseudonym Gwan Pok, meaning "Contemplating Waterfall". Editions in silk-screen have been brought out by the Archivio F. Conz, Verona, and Pari e Dispari Agency in Reggio Emilia, among others. Works are