Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:6/8
K:Amix
['A cec', 'A2 g aeg Tf2 e faf ecA']  
X:1
L:1/8
M:6/8
K:Amix
 d | c2 A cec | TB2 G BdB | Tc2 A cec | e3 a3 | Tc2 A cec | TB2 G Bcd | c2 A BGB | A3 A2 :: g | 
 aeg Tf2 e | faf ecA | aeg Tfec | e3 a3 | d2 e c2 g | B<Bc dBG | Tc2 A BGB | A2 A A2 :|  