Explore different chord combinations to amplify the harmonic dimensions of the submitted music fragment.
[DD]4 | [DD]4 | [DD]4 | [DD]4 |] [FD][AF] [AF][AF] | [FD][AF] [AF][AF] | 
 [FD][FD] [EA,][EC] | [DD]2 [DD]2 |: [DD]2 [EC]2 | [FD][AF] [AF] z | 
 [FD][FD] [EA,][EC] | [DD]2 [DD]2 :|  
X:1
L:1/8
M:2/4
K:D
"D" [DD]4 | [DD]4 | [DD]4 | [DD]4 |]"D" [FD][AF] [AF][AF] | [FD][AF] [AF][AF] | 
 [FD][FD]"A7" [EA,][EC] |"D" [DD]2 [DD]2 |:"D" [DD]2"A7" [EC]2 |"D" [FD][AF] [AF] z | 
"D" [FD][FD]"A7" [EA,][EC] |"D" [DD]2 [DD]2 :|  