Quote:
Originally Posted by Il Duce
key of A should have C#m and F#m chords, not C and F, unless it's song without a tonal centre
|
It doesn't have to be made up completely of diatonic chords to keep its tonal center, tonality isn't that fragile, especially in this case where we have a Parallel key.
If you take this progession
and elaborate it with secondary dominants
it changes nothing in the function of the initial triads.