Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:2/2
K:Dmix
['de f2 ge a2 ge fde^c dcde', 'A2 AB c2', 'de f2 g2 abag fd (3ed^c dcde', 'dcde fd (3cAG A2']  
X:1
L:1/8
M:2/2
K:Dmix
 de | f2 ge a2 ge | fde^c dcde | (3fed (3cAG A2 AB | c2 cd ed (3cAG | (3AdB (3cAF G2{A} (3GFG | 
 A2 (3AAA A2 :: AB | c2 AB cdef | g2 ge a2 ag | 
"^this bar not in P.Glackin's version" ab (3agf g2 ag | f2 fg afge | fde^c dedc | (3ABA Gc A2 de | 
 f2 ge a2 ge | fde^c dcde | (3fed (3cAG A2 AB | c2 cd ed (3cAG | (3AdB (3cAF G2{A} (3GFG | 
 A2 (3AAA A2 :|"^variations" de | f2 g2 abag | fd (3ed^c dcde | fd (3cAG A2 AB | cBcd ed (3cAG | 
 Ad (3cAF G2{A} (3GFG | A2 AG A2 :: AB | cBAB cdef | g2{a} (3gfg a2 ag | ab (3agf g2 ag | 
 fefg abag | (3fed e^c dcde | fd (3cAG A2 de | f2 g2 abag | fd (3ed^c dcde | fd (3cAG A2 AB | 
 cBcd ed (3cAG | Ad (3cAF G2{A} (3GFG | A2{B} (3AGA A2 :|  