Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:3/4
K:Gmin
['dd d2 e2 dd/e/ d2 c2 BA', 'BA/B/ cB AG']  
X:1
L:1/8
M:3/4
K:Gmin
 dd d2 e2 | dd/e/ d2 c2 | BA Bc dB | A/B/c/A/ B2 B,2 :: BA/B/ cB AG | ^FG AF D2 | BA/B/ cB AG | 
 AG/^F/ G2 G,2 :|  