and you might notice that the chords are not all found in one key. There are several possible interpretations, but Rodrigo likes to view the C7-Gm-Am section as being in D minor, with the A minor ...

If you look at a music or piano keyboard ... Of course, not all triads have to be chords of C major or minor. You can use the process, of selecting the 1st (root), 3rd, and 5th degree of either ...