Go to the wood village with the grass type people.
Once there go to the 4 trees, then look to the right and you should see a boulder in front of a house.
Blow it up (if you havent already) and go inside.
Once there look to the left and on top of a drawer there will be a jukebox.
Go up to it and press use. It will play the old Banjo Kazooie music, but only in the house.