Formulate chord sequences to heighten the harmonic quality of the specified musical portion.
|:"^A" d2 D F3/2 G/ A | f e d e c A | d2 D F G A | f e f d3 :: 
"^B" f e d e c A | f e d e c A | d2 D F G A | f e f d3 :|  
X:1
L:1/4
Q:3/4=112
M:6/4
K:D
|:"^A""D" d2 D F3/2 G/ A |"Bm" f e d"A7" e c A |"D" d2 D"Bm" F G A |"A7" f e f"D" d3 :: 
"^B""D" f e d"A7" e c A |"D" f e d"A7" e c A |"D" d2 D"Bm" F G A |"A7" f e f"D" d3 :|  