Salomon wrote:I am new, compliments on the beautiful community.
In any case, welcome
Salomon wrote:I wanted to get some clarification regarding the third degree; it always seems like it cannot be used... but is that really the case?
It seems like a somewhat controversial issue to me, but I haven't understood the criteria yet...
A didactic level, few people use the III because one also needs to know how to explain how to use it... it's like giving a Ferrari to someone who is getting their driver's license. I have happened to know many teachers who don't know what to do with it, so... maybe they ... "forbid" it (I think, it would need to be seen case by case).
I prefer to treat the subject in a historical sense, and the fundamental steps can be summarized as follows:
In the Baroque period, it was used in the form of a first inversion with a cadential function C that moved towards T (Tonic) or I (Deceptive)
Note that it was constructed exclusively with the notes of the relative mode (whether major or minor it was)
Only from Grieg (and by ear, also Schumann), can one find in the major mode the III6 which borrows notes from the minor mode
The III-V-I connections are typically from Russian music or in languages that exploit third affinities, such as Liszt and Schubert (if you feel like it and have De la Motte's manual, go read what he says about the discussion of third affinities... very interesting and well done).
III46, to be clear, in C-Eb-G is essentially used like an appoggiatura and has no functional value.
Since I mentioned De la Motte, I still consider him outdated as a methodology, in the sense that I opt for a more abstract one that allows for the identification of important moments of tonal language:
Tonic (T), Pre-Cadential (PC), Cadential (C), which in turn can go to T or Deceptive (I)
That being said, the III degree has also tended to be used as C, which is why De la Motte's classification does not include it; in fact, he only sees it in the tonic area, and in reality, for a while now I haven't found relevance in reasoning via subdominant and dominant, because the III, for example, can in turn be dominant (...and De la Motte knows this)
An approach like the one I am proposing works very well with Jazz music as well, so I find it more abstract and more "pure."