OK Sounds hip and heavy duty!~ Upper Structure Triads Zomg! Well its not so rough, but it sure sounds cool! Upper structure triads are the triads (3 notes built in any combination of 3rds, or inversions) that are found in the non chord tones of a chord or chord sound or scale or mode. For instance in a C7 chord (without any further instructions like #9 or something) is from the bottom up C - E - G - Bb, and it is assumed that this is the V7 chord from F major unless otherwise noted, and it is assumed that there is a 9 (D), an 11 (F) and a 13 (A), since they are the non listed notes from the F major scale. So in a most basic sense one of the USTs and the most obvious one from C7 is a D minor triad (D - F - A). Any triad created in the modal scale of C mixolydian, or based on F major/ionian mode) using one of the upper notes (9, 11 or 13) is considered an UST. SO... A - C - E is also an UST of C7 and so is an inversion (E - A - C). If you dont get any of this please post here and I will get more details as needed! Dont feel foolish to post please!
The challenge for this time around is to write 8 bars of harmony, at least 6 notes per chord making good use of upper structure triads. CAREFUL to not change the tonality so that D F A *sounds* lilke a d minor chord and not a flavor extending the C7 sound. Otherwise you have re-harmonized instead of used the upper structure triad.