Formulate a range of chord couplings that heighten the harmonic components of the submitted musical creation.
|: A | d>e dc B3 d | e>f ed c3 c | dc BA ^GE Ad | c2 B2 A3 :: e | 
 f2 f2 e3 f | g2 g2 f3 a | ba bc' | d'c'/b/ ag | f2 e2 d3 :|  
X:1
L:1/8
M:4/4
K:D
|: A |"D" d>e dc"G" B3 d |"Em" e>f ed"A" c3 c |"Bm" dc BA"E7" ^GE"A" Ad | c2"E7" B2"A" A3 :: e | 
"D" f2 f2"A" e3 f |"A7" g2 g2"D" f3 a |"G" ba bc' |"D" d'c'/b/ ag | f2"A7" e2"D" d3 :|  