Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:4/4
K:D
['dcdB AFDF AFBA GFEF GABc', '(cd) e^dec A2 (=de) fefd A2']  
X:1
L:1/8
M:4/4
K:D
 A2 | f2 (ed) dcdB | AFDF AFBA | GFEF GABc | defd A2 A2 | f2 (fe) dcdB | AFDF AFBA | GFEF GABc | 
 d2 d2 d2 :: (cd) | e^dec A2 (=de) | fefd A2 f2 | gfeg fedf | edcB A2 (cd) | e^dec A2 (=de) | 
 fefd A2 a2 | ^gfef edcB |1 A2 A2 A2 :|2 A2 (^GA) Bcde ||  