Formulate chord sequences to heighten the harmonic quality of the specified musical portion.
|: [CA] | ([B,G] [DB]) | ([CA] [Ec]/) z/ [CA] | ([B,G] [DB]) | [cE] z [AC] | 
 ([B,G] [DB]) | ([CA] [Ec]/) z/ [eA] | ([Gd] [DG]) | [AC] z :: [eA] | 
 ([Gd] [DB]) | ([Ec] [CA]) z/ [eA] | ([Gd] [DB]) | [Ec] z [eA] | 
 ([Gd] [DB]) | ([Ec] [CA]) z/ [Ec] | ([DB] [B,G]) | [AC] z :|  
X:1
L:1/4
M:23/44
K:Ab
|: [CA] |"Eb7" ([B,G] [DB]) |"Ab" ([CA] [Ec]/) z/ [CA] |"Eb7" ([B,G] [DB]) |"Ab" [cE] z [AC] | 
"Eb7" ([B,G] [DB]) |"Ab" ([CA] [Ec]/) z/ [eA] |"Eb7" ([Gd] [DG]) |"Ab" [AC] z :: [eA] | 
"Eb7" ([Gd] [DB]) |"Ab" ([Ec] [CA]) z/ [eA] |"Eb7" ([Gd] [DB]) |"Ab" [Ec] z [eA] | 
"Eb7" ([Gd] [DB]) |"Ab" ([Ec] [CA]) z/ [Ec] |"Eb7" ([DB] [B,G]) |"Ab" [AC] z :|  