Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:4/4
K:Edor
['BAFB ABde fded', 'ef g2']  
X:1
L:1/8
M:4/4
K:Edor
|: BE E2 BAFB | ABde fded | BE E2 BAFA | BFAF E2 dc | B2 Bd BAFB | ABde fded | B2 AF EFGA | 
 BFAF E2 FA :: (3B^cd ef g2 fe | dB B2 dBAd | (3B^cd ef g2 fe | dBAF E2 ef | g2 ga gfeg | 
 f2 fg fedB | ABde fded | B2 AF E4 :|  