Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:2/4
K:G
['.b).b b/a/g/(d/ .f).f e>d', '.a.a .B.a g2 .BB/a/', 'ff B2 g2 g>g']  
X:1
L:1/8
M:2/4
K:G
 d/(d/ | .b).b b/a/g/(d/ | .f).f e>d | .f.f e>c | ee dd/(d/ | .b).b b/a/g/(d/ | .f).f e>d | 
 de/d/ ^c/d/e/f/ | gbg ::[K:C] g | .a.a .g"^_"c | .B.a g2 | .BB/a/ g2 | .cc/a/ .g"^_"g | 
 .a.a .g"^_"c | .B.a g2 | .BB/a/ .g"^_"B | .c.c.c :| .e.e"^_"c"^_"e/ | ff B2 | g2 g>g | .a.a g2 | 
 .e.e"^_"c"^_"e/ | ff B2 | g2 g>g | c'c'/c'/ c' :|  