The baton magical item is required from Prince Naveen in New Orleans Square. You should level up if you cannot yet obtain it from him by doing other activities in the park. Keep playing the adventures and eventually it will be required anyway to progress those.
On the controller, you use
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in horizontal or vertical directions, with the rhythm of the music. When the musical note is green, you are doing it correctly. Sometimes you need to press other buttons whilst doing this, so be alert. Five stars is required on all of them. Here are the four locations:
New Orleans Square: Jambalaya Jazz BandThis is not far from the fast travel entrance point of New Orleans Square, on the path near the water. If exiting the Pirates of the Caribbean attraction, just walk straight ahead under the bridge and the band is on the right.
New Orleans Square: Royal Street BachelorsThe band is playing near Prince Naveen. From the fast travel entrance point of New Orleans Square, you should see Princess Tiana - just walk past her and turn left at the junction to see Naveen and this band.
New Orleans Square: Grim Grinning GhostsThere are busts located near the Haunted Mansion attraction. Easiest way of locating them is to exit the attraction (use park map to fast travel)/go to its entrance (red marker). Now turn and face the entrance, follow the left path (queue of guests) and the busts will be in the small area at the end.
Adventureland: Enchanted Tiki RoomFrom the fast travel entrance of Adventureland, there is the Enchanted Tiki Room on the left side. Just walk back a bit (before the actual sign for Adventureland).
This one for me was most difficult. You really have to try and get every note to count and the rhythm is fast. You can actually keep moving both sticks even when it's asking for one side only. This will help you flow into the next dual notes. Try and get perfect/super on the button presses too. I got 5 stars with 13700 points.