2. What musical ensemble uses instruments made from bamboo and other indigenous materials? 3. What indigenous materials does PUP Banda Kawayan use? 4. What musical ensemble in Iloilo uses tultugan, an instrument equivalent to drums, gabbang, angklung, paspas, rainstick, tala-tala, and bamboo flute? 5. What do you call a musical ensemble with performers playing angklung, a bamboo instrument which consists of two or more bamboo tubes tuned in octaves?​