Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/8
M:4/4
K:Gmin
['BA G2 g2 g3 ^f g6 ga', 'A6 a2 b3 d d>f e>g f4']  
X:1
L:1/8
M:4/4
K:Gmin
 BA | G2 g2 g3 ^f | g6 ga | b2 f2 f3 _e | d2 B2 B2 cd | _edcB B3 A | A6 :| a2 | b3 d d>f e>g | 
 f4 e3 f | d3 _e c3 B | B6 BA | G2 c2 c3 b | c6 f_e | d2 b2 ^f3 g | g6 :|  