The section I'm referring to is circled in red. enter image description here

The piece is in D♭ major. And I think here it's in F mixolydian, as both Cmin7 and F7 are in F mixolydian. Also, this part is the end of a phrase and sounds quite finalised before it moves back to the opening phrase which begins on G♭M7 (chord 4 of D♭). Why does it sound so finalised?

The piece is Merry Christmas Mr Lawrence..

  • Are you sure Fmaj7 is in F Mixolydian? F Mix. contains all the notes from Bb major. That key has Eb in it, not Enat. – Tim Jul 26 '19 at 16:11
  • @Tim sorry I meant fdom7, I put major 7 accidentally. Just made the change thanks! – Cameron Brown Jul 26 '19 at 16:31