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
['f2 ff', 'd2 fd']  
X:1
L:1/8
M:4/4
K:D
 de |:"D" f2 ff f2 gf |"A" e2 c2"D" d3 d |"A" c2 d2 efec |"D" d2 e2 f2 d2 |"D" f2 ff f2 gf | 
"A" e2 c2"D" d3 d |"G" g2 (3fgf e2 d2 |1"A" B2 c2"D" d2 A2 :|2"A" B2 c2"D" d2 (3ABc |: 
"D" d2 fd adfd |"C" =c2 ec gcec |"D" d2 fd adfa |"G" bgec"A" dcBA |"D" d2 fd adfd | 
"C" =c2 ec gcec |"D" Adfa"G" bgec |1"D" df"A"ec"D" d2 (3ABc :|2"D" df"A"ec"D" d4 ||  