Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:2/4
K:Emin
['b>b b>b', '(f{^a}b) (f{a}b) (g{^a}b) (g{a}b) a(a/b/) g(g/b/) f/B/^c/^d/', '.b.^a.b.a b>g eg fbfb g/B/c/d/ e/f/g/a/ b(f/a/)']  
X:1
L:1/8
M:2/4
K:Emin
!f! B | b>b b>b | .b.a.g.e | .^d.c.B.A | GF/G/ EB | b>b b>b | .b.a .g.e | Bc/B/ B/A/F/G/ | 
 [EG,]3 |]!mf! !fermata!c | (f{^a}b) (f{a}b) | (g{^a}b) (g{a}b) | a(a/b/) g(g/b/) | 
 f/B/^c/^d/ e/f/g/a/ |!f! b>b b>b | .b.a.g.e | B({d}c/B/) B(f/g/) | (f2"^D.C." e) |] 
[K:E]!mf! (g/a/) | .b.^a.b.a | b>g eg | fbfb | g/B/c/d/ e/f/g/a/ | b"^cresc."^aba!f! | 
 b(f/a/) g(e/g/) | f(c/e/) d(B/d/) | eg"^D.C."e |]  