Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/16
M:2/4
K:G
['GB,DG BDGB dGBd gbag', 'G2B2G2 ub2 bB^df bagf e^def gfg^g aA^ce']  
X:1
L:1/16
M:2/4
K:G
 (uBA) | GB,DG BDGB | dGBd gbag | fed^c =cAFD | GBAG FDBA | GB,DG BDGB | dGBd gbag | fd^c=c ADFA | 
 G2B2G2 :: ub2 | bB^df bagf | e^def gfg^g | aA^ce agfe | edd^c .d2(ab) |"^4" c'afd ^cdef | 
 gfga bgag | fAce dFBA | G2B2G2 :|  