Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:4/4
K:G
['G2 D2 E>GF>A G4', 'G)ABd ed']  
X:1
L:1/8
M:4/4
K:G
 (3(A/B/c/ | d>)BA>B G2 D2 | E>GF>A G4 | E>GF>A G2 B2 | A>EF>G A3 (3A/B/c/ | d>BA>B G2 D2 | 
 E>GF>A G4 | c>cB>A d>BG>A | B2 A2 G3 (3(D/E/F/ ||[M:2/4][K:G] G)ABd | ed d/d/B/c/ | dc c/c/A/A/ | 
 ed d(3(D/E/F/ | G)ABd | ed d2 |1 ([df]>e) ([df]>e) | dd d(3D/E/F/ :|2 ([df]>e) d(e/f/) | 
 [Bg][Bg] [Bg] ||  