Formulate chord combinations to increase the harmonic complexity of the specified musical excerpt.
"^A" |: E2 c2 BA | ^G2 A2 BA | ^G3 E FD | E6 | E2 e2 dc | B2 c2 dc | B2 e2 Be | 
 B4 (3Bc^c | d3 c BA | ^G2 A2 Bc | B3 A ^GF | E2 F4 | D2 c2 BA | ^G3 E FD | 
 E3 F ^GA | B6 :|"^B" |: e2 ^d2 e2 | c6 | e^d ^fe dc | B6 | eA Bc ^de | ^d4 c2 | 
 BE e^d cB | A6 :|"^C" |: cB A^G Ac | BA ^GE GB | A^G AG FE | A2 D4 | 
 DE F2 ^GA | dc BA ^GF | EF EF ^GA | B6 :|  
X:1
L:1/8
M:3/4
K:Amin
"^A" |:"Am" E2 c2 BA | ^G2 A2 BA |"E" ^G3 E FD | E6 |"Am" E2 e2 dc | B2 c2 dc |"E" B2 e2 Be | 
 B4 (3Bc^c |"Dm" d3 c BA | ^G2 A2 Bc |"E" B3 A ^GF | E2 F4 |"Dm" D2 c2 BA | ^G3 E FD | 
"E" E3 F ^GA | B6 :|"^B" |:"Am" e2 ^d2 e2 | c6 | e^d ^fe dc |"E" B6 |"Am" eA Bc ^de | ^d4 c2 | 
"E" BE e^d cB |"Am" A6 :|"^C" |:"Am" cB A^G Ac |"E" BA ^GE GB |"Dm" A^G AG FE | A2 D4 | 
"Dm" DE F2 ^GA | dc BA ^GF |"E" EF EF ^GA | B6 :|  