In its most modern incarnation, angklung is performed in schools as an aid to learning music. The Angklung received international attention when Daeng Soetigna, from Bandung, expanded the angklung notations not only to play traditional pélog or sléndro scales but also diatonic scale in 1938. Since then, angklung is often played together with other Western musical instruments in an orchestra. One of the first well-known performances of angklung in an orchestra was during the Bandung Conference in 1955. Like those in angklung, the instruments of the calung ensemble are of bamboo, but each consists of several differently tuned tubes fixed onto a piece of bamboo; the player holds the instrument in his left hand and strikes it with a beater held in his right. The highest-pitched calung has the highest number of tubes and the densest musical activity; the lowest-pitched, with two tubes, has the least. Calung is nearly always associated with earthy humour, and is played by men. Arumba refers to a set of diatonically tuned bamboo xylophones, often played by women. It is frequently joined by modern instruments, including a drum set, electric guitar, bass, and keyboards. Theatre Wayang golek is a traditional form of puppetry from Sunda. Unlike the better-known leather shadow puppets (wayang kulit) found in the rest of Java and Bali, wayang golek puppets are made from wood and are three-dimensional, rather than two. They use a banana palm in which the puppets stand, behind which one puppeteer (dalang) is accompanied by his gamelan orchestra with up to 20 musicians. The gamelan uses a five-note scale as opposed to the seven-note western scale. The musicians are guided by the drummer, who in turn is guided by signals from the puppet master dalang gives to change the mood or pace required. Wayang golek are used by the Sundanese to tell the epic play "Mahabarata", and various other morality-type plays. Sandiwara Sunda is a type folk teather performed in Sundanese and presenting Sundanese themes, folklores and stories. Dance Sundanese dance shows the influence of the many groups that have traded and settled in the area over the centuries, and includes variations from graceful to dynamic syncopated drumming patterns, quick wrist flicks, sensual hip movements, and fast shoulder and torso isolations. Jaipongan is probably the most popular traditional social dance of Sundanese people. It can be performed in solo, grups, or pair. The Tari Merak (Peafowl Dance) is