Not only bongos but also congas, cajon, djembe and timbale sounds should now be almost mandatory in the percussion area of every music program, as these instruments have been used in many styles of music for a long time. In order to be able to write songs or rhythms, the basic sounds of these instruments should be present and not just "High" & "Low". Furthermore, different note heads should be available in order to be able to represent these sounds.