Name and distribution of function keys
1. Loudspeaker
2. Power switch
3. Fill-in
4. Stop button
5. One key
6. Volume button
7. Guide button
8. Record
9. Playback/effect
10. Single finger chord
11. Rhythm programming
12. Fingered chord
13. Demo
14. Percussion/timbre shift
15. Timbre select A/B
16. Percussion keys/timbre keys
17. Tempo button
18. Rhythm keys
19. Chord keys
