The Kecak dance in Bali is a performance that utilizes no instruments, just vocal chords. I have about an hour of footage from this dance, but I really like the harmony in this very dark 5 minute portion. It is repetitive until the 1 minute 30 second mark, and than it gets fairly sonorous as the small amount of light left in the day fades completely. This is more for ears than eyes. The last video cracks me up.