Hint: Spoof The Mike
Try blowing into the clap microphone. This fools the game and makes DK clap tons of times. Note this was mentioned by Dixie Kong.
Unlockables
Dixie's Notes 10: Earn a gold DK on each Monkey duet arrangement.
Dixie's Notes 11: Earn a gold DK on each solo Monkey arrangement.
Dixie's Notes 12: Complete the 6-Song Set in Challenge Mode.
Dixie's Notes 2: Collect at least one of each badge.
Dixie's Notes 3: Purchase all the Gorilla arrangements from the Shopping Mall.
Dixie's Notes 4: Earn a gold DK on each Gorilla duet arrangement.
Dixie's Notes 5: Earn a gold DK on each solo Gorilla arrangement.
Dixie's Notes 6: Complete the Full Set in Challenge mode.
Dixie's Notes 7: Earn a gold DK on each Chimp duet arrangement.
Dixie's Notes 8: Earn a gold DK on each solo Chimp arrangement.
Dixie's Notes 9: Complete the 12-Song Set in Challenge mode
Extra sound sets: All the sound sets from Donkey Konga 1, can be imported to Donkey Konga 2 by saving on the same memory card that has your Donkey Konga 1 data.
Echo Feature in Freestyle Zone: Unlock Dixie's Notes 76 (clear at least 325 songs).
Na Na Hey Hey Kiss Him Goodbye in Freestyle Zone: Complete the Full Set in Challenge mode.
Unlockable: Donkey Konga 1 Soundsets
Load a memory card with a Donkey Konga 1 file.