Three judges evaluated the singing and presentation. Every choir had 3 tasks...
to sing a rendition of 'To God be the glory' (in English and Bemba), to perform a 'self-composition', and to present a piece of advanced musical skill refered to as 'notes'. At least one piece included percussion instruments: drums, a shaker instrument called an icisekese, tambourine, marimba. And no other accompaniment, all a capella. Wow! I enjoyed every minute.