Re: History of seventh combinations

Dear Margo

Thanks for your post. I'm familiar only with static (or paradigmatic)
aspect of chords and scales and you give me a glimpse on dynamic (or
syntagmatic) aspects of harmony.

Since

1) your historic examples of chords are in a class I name "constitutive",

2) I seek for a clear distinction between "constitutive" and "extension"

3) I can't really express complex ideas in english

4) (I'm fluent only in french and "graphics")

I would like to show you a figure where many elements in dicussion are
organized. Your examples of chords are included an chords of my first
question.

Could you give me your opinion on possibility to use such chordal matrix
for justification of some trends in musical language before XXth century.

http://www.aei.ca/~plamothe/seventh.htm

Thanks for your attention

Pierre Lamothe