I understand that what defines an I chord in the root position is:
- the bass note (i.e. the lowest note) must be of scale degree 1 and,
- scale degree 3 and 5 must appear as higher notes (in no particular order),
and any particular degree can be repeated over multiple octaves, see e.g. Section 1.3 of Hooktheory 1. I tried to reproduce some of the examples in the book by using chords in their “closest” form, e.g. 0-4-7 semitones for a major chord. This of course gives rise to very discontinuous and unnatural chord progressions. I’m wondering if there is a theoritically proper way to spread the notes of a chord over multiple octaves? For example, if I’m reading a music sheet with chord names only, is the author assuming I know the common variation to play? or is it left to the instrument player to interpret the chords and find what is best sounding?
P.S. After playing with Hookpad a bit, I noticed you always duplicate the bass an octave lower and play the highest three notes possibly in an inverted configuration. For example in C major, I, vi and vii^o have their three highest notes in root position, with their root note duplicated an octave below. Similarly, the three highest notes of ii and iii are in their second inversion, while iv and v are in their first inversion. Is there any kind of rule I can extrapolate from this that would apply to any key/mode and more complex chords, such as inversions or 7th chords?