Originally posted by Uncle Dave:
Scott,
In a major scale, the V chord is not assumed to have a flatted seventh, although it IS very common. The number system refers only to a basic tiad, unless an embellishment is added.
The rest of your description is right on the money, and very easy to understand.
True. That's why I added the 7 (as an embellishment) to signify the addition of the flatted 7th in the V chord.
btw: The REASON our ears beg to hear a I chord (C) following a V7 chord (G7) is because of the unstable tri-tone interval: B & F (3rd & b7) which occurs in all major dominant chords. Prior to the 20th century, the tritone interval (b5) was considered the devil's interval and accepted music required that a major dominant chord be 'resolved' to a more stable chord. Only in the 20th century is the dominant chord now commonly played (ei: in the Blues, and jazz & rock) without requiring resolution to a I chord:
http://www.angelfire.com/fl4/moneychords/Blues.html Scott
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