Secondary and Extended Dominants Chords
Handout #4 Music 214 Secondary and Extended Dominants Chords Secondary dominant has many definitions depending on the type of musical genre you are working in. Generally speaking, it is typically a dominant 7th chord that is not the dominant of the prevailing key. The concept of the secondary dominant was not recognized in writings on music theory prior to 1939. Before this time, in music of Bach, Mozart, Beethoven, and Brahms, a secondary dominant, along with its chord of resolution, was considered to be a modulation. Because the effect of modulation was so short, and did not sound like a real arrival of a new key, the two chords had a special name--"transient modulation"--that is, a modulation in which the new key is not established. This description did not truly reflect what was happening in the music so theorists in the early 1900s, such as Frank Shepard, Benjamin Cutter, and George Wedge, searched for a better description of the phenomenon. In 1939, in a manuscript entitled "Principles of Harmonic Analysis," Walter Piston first used the analysis "V7 of IV." (Notably, Piston's analytical symbol always used the word "of"--e.g. "V7 of IV" rather than the virgule [slash notation] "V7/IV) In his 1941 "Harmony" Piston used the term "secondary dominant" for the first time. It has been generally accepted in music theory since then. Secondary dominant chords momentarily tonicize a note other than the tonic by functioning as that note's dominant, but don't normally indicate any modulation, and can occur on any degree of the scale.
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