Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:3/8
K:Bb
['(A/B/)(A/B/)(A/B/) d2 B (A/c/)(A/c/)(A/c/) e2 c b(f^f)', '(D/F/)(D/F/)(D/F/) BFD', 'B3 [K:Eb] (ed).c (BA).G FGA A2 G']  
X:1
L:1/8
M:3/8
K:Bb
 (A/B/)(A/B/)(A/B/) | d2 B | (A/c/)(A/c/)(A/c/) | e2 c | b(f^f) | gec | F/c/A/c/A/c/ | B3 :: 
 (D/F/)(D/F/)(D/F/) | BFD | (Fe)e | (Fc)c | (D/F/)(D/F/)(D/F/) | BFD | Fe/F/e/F/ | B3 :: 
[K:Eb] (ed).c | (BA).G | FGA | A2 G | FGA | GFE | DF/D/F/D/ | E3 :|  