Complex sentence: Players often use wax to close fingerholes and alter the sound of the flute, blocking one or other tone hole on the kuisi sigi, and on the kuisi bunzi either the upper or lower fingerhole so that only four holes are in use at any one time.
Split into simpler sentences: Players often use wax to close fingerholes and alter the sound of the flute. One or other on the kuisi sigi, and on the kuisi bunzi either the upper or lower fingerhole so that only four holes are in use at any one time.