Idiophones
Instruments that produce sound from the substance of the instrument itself (wood or metal) are classified as idiophones. They are further subdivided into those that are struck, scraped, plucked, shaken, or rubbed. In the Philippines there are metal and wooden (principally bamboo) idiophones.
Metal idiophonse are of two categories: flat gongs and bossed gongs. Flat gongs made of bronze, brass, or iron, are found principally in the north among the Isneg, Tingguian, Kalinga, Bontok, Ibaloi, Kankanai, Gaddang, Ifugao, and Ilonggot. They are most commonly referred to as gangsa. The gongs vary in sized, the average are struck with wooden sticks, padded wooden sticks, or slapped with the palm of the hand. Gong playing among the Cordillera highlanders is an integral part of peace pact gatherings, marriages, prestige ceremonies, feasts, or rituals.
In southern Philippines, gongs have a central profusion or knot, hence the term bossed gongs. They are three of types: (1) sets of graduated gongs laid in a row called the kulintang; (2) larger, deep-rimmed gongs with sides that are turned in called agung, and (3) gongs with narrower rims and less prominent bosses called gandingan. These gongs may be played alone but are often combined with other instruments to form various types of ensembles.
Bamboo idiophones abound in the Philippines-xylophones, drums, quill-shaped tubes, stamping tubes, scrapers, buzzers, and clappers. The bamboo xylophone, gabbang, is found in southern Philippines among the Yakan, Sama, Tausug, and Palawan. It consists of bamboo keys of graduated lengths mounted on a trapezoidal box. The number of keys varies among the different tribes, ranging from 3 to 22. In northern Luzon, among the Kalinga, individual xylophone-like blades called patatag are struck with bamboo sticks.
The bamboo slit drum, such as the Bukidnon bantula is fashioned out of a bamboo tube closed at both ends with anode with a slit cut out of the tube. Found among different groups of people, its main use is to announce important events.
The struck quill-shaped bamboo tubes with notches etched on the tube, are found only in southern Philippines such as the Maranao tagutok and the Maguindanao kagul. The player scrapes the notches with a bamboo stick. Among the Cordillera highlanders, bamboo buzzers are widespread. They are made from a length of bamboo closed with a node at the bottom, with its top half shaped so that two tongues face each other. The top half is struck against the palm of the hand. They are known by different names such as balingbing, pew-pew, pakkung, bilbil, bungkaka by the various groups.
The Ifugao have a bamboo clapper, hanger, fashioned from a tubular section of bamboo, split from one end to approximately half of the tube. Each half of the split portion is shaped to make it narrower in the middle, thus making it more flexible when the halves are made to flap against each other. Wooden idiophones include sticks, suspended logs, and log drums. The Hanunuo kalutang consists of pair of sticks cut from forest trees. These are struck against each other and played while hiking through forest and mountain trails. The Ifugao pattung is a percussion yoke bar made from a tapered piece of wood and struck with a stick. It is used in a ceremonies for the sick, at rites which entail the offering of sacrificial pigs, or at death rituals.
Suspended logs are widespread in southern Philippines where they are known by different tribes. The Maguindanao luntang consists of several logs of varying lengths hung in order from longest to shortest. The pointed playing ends of each log is struck by one performer creating a melody against which another performer beats drone rhythm on one of the logs. The Tagakaolo edel is a sounding board with resonator played during wedding celebrations together with a drum or gong to accompany dancers. The Bagobo and Bilaan have similar drums.
Jews harps are bound all over the Philippines. They are principally made from bamboo although in Philippines some are made of metal. It is a type of mouth resonated instrument consisting of a flexible tongue fixed at one end to a surrounding frame. The player places the free end of the instrument with the hand, or in some other types by pulling a string attached to the blade. The instruments have different manes among the various tribes. In the south the most common term is kubing, in the north ulibaw.

Aerophones
Philippine bamboo aerophones include various types of flutes, pan-pipes, and reed pipes. The most widespread and numerous are the flutes which are mostly end-blown with the air stream directed into the open end of the tube. The lip valley notch flute, so called because of its mouthpiece which is obliquely cut and curved at a slant to follow the contour of the player's lips, is found in northern and southern Philippines. They are known by different names among the different linguistic groups, such as the paldong in the south and the palendag in the north. They are instruments of leisure, used for serenading, courting, or merely to pass the time away. The nose flute, another type of end-blown flute, is found mostly in northern Philippines where the Kalinga call it tongali, the Bontok kaleleng, and the Ifugao ungiung. It is found sporadically in some areas of the south among the Hanunuo (lantuy), the Batak (lantoy), and the Bukidnon (bulaktob). The Cuyunin of Palawan have gigantic nose flutes with tubes much larger in diameter than those found in Luzon. Less common flutes are the ring type called suling in southern Philippines; the whistle type called thumpong (Subanun); and the reed called saunay (Tausug).Stopped pipes found in northern Philippines are the saggeypo (Kalinga) and the sagay-op (Bontok). The bamboo pipe is closed on one end by a node with the open end held against the lower lip of the player as he blows directly across the top. The pipe can be played individually by one person or in ensembles of three or more.
Rarely used today is the bamboo panpipes called diwas, diwdiwas, or dew-dew. These consist of a number of bamboo pipes (5-8)strung together. Most Philippine transverse flutes are adaptations or imitation of European versions evident in the borrowed names such as flauta (Ilonggo, Sebuano, Bicol); plawta (Manobo) and palawta (Hanunuo, Waray). The Cuyunin use a transverse flute called tipanu which is also found among the Batak of Palawan. Other blown instruments are those made from shell or carabao horn. These are used for calling people or sending messages over wide distances. Shell trumpets include the budyong, lungga, taburi. Carabao horns are the tambuli (Tagalog) and kogao (Ifugao). *MEI

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