Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:4/4
K:D
['A2 AG FAdB', 'f2 df']  
X:1
L:1/8
M:4/4
K:D
 B | A2 AG FAdB | AGFD EA A2 | A2 AG FAdB | ABde fdd :| e | f2 df efdf | afdf edBd | f2 df efdA | 
 BdAG FDDe | f2 df efdf | afdf edBA | ABAB dfbf | afeg fd d2 |]  