Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/16
Q:1/8=126
M:2/8
K:A
['', 'A3 B']  
X:1
L:1/16
Q:1/8=126
M:2/8
K:A
[M:3/8] AA |: A3 B BB |[M:2/8] de dc |[M:3/8] B3 c cc |[M:2/8] cd cB |[M:3/8] A3 B Bc | 
[M:2/8] Bc BA | GA Bc | B2 A2- |1 A2 AA :|  