*Second inversions were only used on three occasions as they were considered to be too weak to sustain the harmonic interest. Those three occasions were called 6/4s (figured bass terminology as opposed to the A,B,C method), and these three "6/4s" in turn, were named 'passing', 'auxilliary' and 'cadential'
**Chord III was generally avoided because of it's ambiguous properties. Was it a variation of chord I7 without the bass (not used at this time) or chord V (with added pedal)? (Remember, chords I and V, tonic and dominant, are the strongest chords in vertical harmony in relation to the harmonic series). Later composers used it widely, but it was usually in the form of a secondary dominant (sharpened 3rd and added 7th) that resolved to chord VI in the form of a perfect cadence.
***Chord VIb was generally avoided because it's structure (in C Major, for argument's sake) C, E, A sounded like an incorrect version of the tonic in root position (C, E, G) which was the strongest chord available.
Ogg Vorbis, does that help you understand the relationship between figured bass (vertical harmony in general) and metre? I'd sure be interested to know.


