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
['', 'fedc AddA']  
X:1
L:1/8
M:4/4
K:D
 dB |:"D" AddA fddf | Adde fedc |"G" BddB"D" AddA |"G" (3Bcd ce"A" dcBA |"D" AddA fddf | 
 Adde fedc |"G" BddB"D" AddA |1"G" (3Bcd"A" ce"D" d2 dB :|2"G" (3Bcd"A" ce"D" d2 cB |: 
"D" Aaa"G"B- Ba"A"ca |"D" dAAf fedc |"G" BddB"D" AddA |"G" (3Bcd"A" ce"D" d2 cB | 
"D" Aaa"G"B- Ba"A"ca |"D" daaf- fedc |"G" BddB"D" AddA |1"G" (3Bcd"A" ce"D" d2 dB :|2 
"G" (3Bcd"A" ce"D" d2 ||  