What is "diwas"

Diwas is a native bamboo wind instrument in the Philippines which is a variation of the well-known panflutes or panpipes. It is made of bamboo with one of its end closed via the node of the bamboo. It also does not have finger holes (or tone holes) which is unlike popular aerophones like flutes that have finger holes or tone holes to play different pitches on the instrument. But Diwas compensate on this by grouping pipes of graduated length together. So to produce sound with varying pitch, you shift from one pipe to another. In Kalinga, these individual pipes are known as Saggeypo which is why Diwas is sometimes called as Saggeypo. Usually, the number of Saggeypos strung together ranges from 5 to 8.