Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:6/8
K:D
['d2 d', 'ABA FDF']  
X:1
L:1/8
M:6/8
K:D
 (3A/B/c/ | d2 d ded |{d} cBA ABc | d2 d de_f | ecA A2 B/A/ | d2 d ded |{d} cBA ABc | dB/c/d =cBA | 
 GEE E2 :: (A/G/) | FDF ABA | FDF ABA | ECE GAG | ECE GAG | FDF ABA | FDF ABc | d(B/c/d) =cBA | 
 GED D2 :|  