Formulate chord combinations to increase the harmonic complexity of the specified musical excerpt.
EGBE G3 B | A3 G FGAF | EGBE G3 B | AGFA BEED :: EGBE c3 d | 
 BBBG AGFG | EGBE c3 d | BAGB A4 :: FGBF GBFG | EFGE FGEF | 
 DFAD FADF | AGFG E2 z2 :|[K:D]"^Arr. 2" BdfB d2 df | eeed cdec | 
 BdfB d2 df | edcd B2 a2 :: BdfB g2 ge | f2 fa fefd | 
 BdfB g2 ge | fedf e2 a2 :: cdfc dfcd | BcdB cdBc | AceA ceAc | 
 edcd B2 a2 :|  
X:1
L:1/8
M:2/2
K:G
"Em" EGBE"G" G3 B |"D" A3 G FGAF |"Em" EGBE"G" G3 B |"D" AGFA"Em" BEED ::"Em" EGBE"C" c3 d | 
"G" BBBG"D" AGFG |"Em" EGBE"C" c3 d |"G" BAGB"D" A4 ::"Bm" FGBF GBFG |"Em" EFGE FGEF | 
"D" DFAD FADF |"D" AGFG"Em" E2 z2 :|[K:D]"^Arr. 2""Bm" BdfB d2 df |"A" eeed cdec | 
"Bm" BdfB"D" d2 df |"A" edcd"Bm" B2 a2 ::"Bm" BdfB"G" g2 ge |"D" f2 fa"A" fefd | 
"Bm" BdfB"G" g2 ge |"D" fedf"A" e2 a2 ::"F#m" cdfc dfcd |"Bm" BcdB cdBc |"A" AceA ceAc | 
"A" edcd"Bm" B2 a2 :|  