Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/4
M:3/4
K:D
['d e', 'a a']  
X:1
L:1/4
M:3/4
K:D
 d d e | c3/2 d/ e | f f g | f3/2 e/ d | e d c | d3 :: a a a | a3/2 g/ f | g g g | g3/2 f/ e | 
 f (g/f/)(e/d/) | f3/2 g/ a | (3(b/a/g/) f e | d3 :|  