Hmm
now i am confused :\
B D F is a diminished triangle
but in septa chords the B D F Ab is also called diminished
(diminished triangle + diminshed septima).
this chord is not a Bdimadd6, but B-5-7 (for some reason and i dont know why the 4th note of this chord is considered as diminished 7th steph and not 6th step of the scale).
i guess the book im using is just errm badly written
and the B D F Ab should be called not dimished chord but diminished septa chord..
Anyhow, since were talking theory already, do you know any places on the net where i can learn more about harmony and melody other theory stuff?