Altered tones

In addition to the diatonic pitches of the tonic to which each chord refers, you may add the following tension notes to your lines:

chord

add

example

ii⁷
the leading tone(+ 7) add c^# to the notes of the C major scale when playing over Dm⁷
now you're using the pitches D, E, F, G, A, B, C, C^#, D instead of plain D, E, F, G, A, B, C, D

V⁷
- 5 add d^b to the C major scale when playing over G⁷
now you're using the pitches G, A, B, C, D^b, D, E, F, G instead of plain G, A, B, C, D, E, F, G

I maj⁷
+ 4 add f^# to the C major scale when playing over C maj⁷
now you're using the pitches C, D, E, F, F^#, G, A, B, C instead of plain C, D, E, F, G, A, B, C

[ Music 248 ]

chord	add	example
ii⁷	the leading tone(+ 7)	add c^# to the notes of the C major scale when playing over Dm⁷ now you're using the pitches D, E, F, G, A, B, C, C^#, D instead of plain D, E, F, G, A, B, C, D
V⁷	- 5	add d^b to the C major scale when playing over G⁷ now you're using the pitches G, A, B, C, D^b, D, E, F, G instead of plain G, A, B, C, D, E, F, G
I maj⁷	+ 4	add f^# to the C major scale when playing over C maj⁷ now you're using the pitches C, D, E, F, F^#, G, A, B, C instead of plain C, D, E, F, G, A, B, C