| 释义 |
- References
A tetrad is a set of four notes in music theory. When these four notes form a tertian chord they are more specifically called a seventh chord, after the diatonic interval from the root of the chord to its fourth note (in root position close voicing). Four-note chords are often formed of intervals other than thirds in 20th- and 21st-century music, however, where they are more generally referred to as tetrads (see, for example, {{harvnb|Hanson|1960|loc=18, 22, 28, 32, et passim}}, {{harvnb|Gamer|1967|loc=37 & 52}}, and {{harvnb|Forte|1985|loc=48–51, 53}}). Allen Forte in his The Structure of Atonal Music never uses the term "tetrad", but occasionally employs the word tetrachord to mean any collection of four pitch classes {{harv|Forte|1973|loc=1, 18, 68, 70, 73, 87, 88, 21, 119, 123, 124, 125, 138, 143, 171, 174, and 223}}. In 20th-century music theory, such sets of four pitch classes are usually called "tetrachords" ({{harvnb|Anon.|2001}}; {{harvnb|Roeder|2001}}). References - {{wikicite|ref={{harvid|Anon.|2001}}|reference=Anonymous (2001). "Tetrachord". The New Grove Dictionary of Music and Musicians, second edition, edited by Stanley Sadie and John Tyrrell. London: Macmillan Publishers.}}
- {{wikicite|ref={{harvid|Forte|1973}}|reference=Forte, Allen (1973). The Structure of Atonal Music. New Haven and London: Yale University Press. {{ISBN|0-300-01610-7}} (cloth) {{ISBN|0-300-02120-8}} (pbk).}}
- {{wikicite|ref={{harvid|Forte|1985}}|reference=Forte, Allen (1985). "Pitch-Class Set Analysis Today". Music Analysis 4, nos. 1 & 2 (March–July: Special Issue: King's College London Music Analysis Conference 1984): 29–58.}}
- {{wikicite|ref={{harvid|Gamer|1967}}|reference=Gamer, Carlton (1967). "Some Combinational Resources of Equal-Tempered Systems". Journal of Music Theory 11, no. 1:32–59.}}
- {{wikicite|ref={{harvid|Hanson|1960}}|reference=Hanson, Howard (1960). Harmonic Materials of Modern Music: Resources of the Tempered Scale. New York: Appleton-Century-Crofts.}}
- {{wikicite|ref={{harvid|Roeder|2001}}|reference=Roeder, John (2001). "Set (ii)". The New Grove Dictionary of Music and Musicians, second edition, edited by Stanley Sadie and John Tyrrell. London: Macmillan Publishers.}}
{{Pitch segments}}{{DEFAULTSORT:Tetrad (Music)}} 1 : Simultaneities |