Formulate chord sequences to heighten the harmonic quality of the specified musical portion.
dcAG F2 DF | E2 CE FDFA | dcAG F2 DF | Add^c defe | dcAG F2 DF | 
 EDCE FDD^c | dcAG FDDF |1 Add^c d4 :|2 Add^c d3 e |: f2 fe fagf | 
 ecgc acgc | fede fagf | edce d^cde | f2 fe fagf | ecgc acgc | 
 fedf edcB |1 Add^c d3 e :|2 Add^c d4 ||  
X:1
L:1/8
M:4/4
K:Dmin
"Dm" dcAG F2 DF |"C" E2 CE"Dm" FDFA | dcAG F2 DF |"Gm" Add^c"A" defe |"Dm" dcAG F2 DF | 
"C" EDCE"Dm" FDD^c | dcAG"Bb" FDDF |1"Am" Add^c"Dm" d4 :|2"Am" Add^c"Dm" d3 e |:"Dm" f2 fe fagf | 
"C" ecgc acgc |"Dm" fede fagf |"Am" edce"Dm" d^cde |"Dm" f2 fe fagf |"C" ecgc acgc | 
"Dm" fedf"Bb" edcB |1"Am" Add^c"Dm" d3 e :|2"Am" Add^c"Dm" d4 ||  