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The ''Magic Chord'' is a chord and installation (1984) created by La Monte Young, consisting of the pitches E, F, A, B, D, E, G, and A, in ascending order and used in works including his ''The Well-Tuned Piano'' and ''Chronos Kristalla'' (1990).〔Grimshaw, Jeremy (2011). ''Draw A Straight Line and Follow It: The Music and Mysticism of La Monte Young'', p.176. ISBN 978-0-19-974020-8.〕 The latter was performed by the Kronos Quartet and features all notes of the magic chord as harmonics on open strings.〔 The quartet has been described as, "offer() perhaps the ultimate challenge in performing in a just environment."〔Strange, Patricia and Strange, Allen (2001). ''The Contemporary Violin: Extended Performance Techniques'', p.160. ISBN 978-0-520-22409-4.〕 Described as, "complex and throbbing," the chord does not contain its fundamental (see root (chord)),〔Duckworth, William (2009). ''Sound and Light: La Monte Young and Marian Zazeela'', p.187. ISBN 978-0-8387-5738-3.〕 E, and is a subset of the ''Romantic Chord''.〔Potter, Keith (2002). ''Four Musical Minimalists: La Monte Young, Terry Riley, Steve Reich, Philip Glass'', p.86. Cambridge. ISBN 9780521015011.〕 "When the ''Magic Opening Chord'' is obtained by playing the ''Opening Chord'' at one end of a room while the ''Magic Chord'' is played at the other (as Young set it up for me), the feeling-changes of the stereo effect as you move back and forth()are dazzling."〔 The opening chord consists of E, B, C, E, F, B (ratios 4:6:7:8:9:12),〔Duckworth (2009), p.168.〕 adding C〔Potter (2002), p.87.〕 and E to the magic chord when combined as the magic opening chord. ''The Well-Tuned Piano'' is based on a pitch lattice of perfect fifths and harmonic sevenths, and the tuning of the magic chord is as follows:〔Gann, Kyle (1997). "(La Monte Young's The Well-Tuned Piano )", ''La Monte Young Web Page''.〕 For example, G (21/16) is the harmonic seventh of the perfect fifth (7/4 * 3/2 = 21/16): (C )G D A E (Eb)Bb F ==Sources== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Magic chord」の詳細全文を読む スポンサード リンク
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