Long time ago, angklung was an instrument that had religious ritual function. The main function of angklung was as a medium to invite Dewi Sri (rice goddess/prosperity) to come down to the earth and gave fertility to plants. They used tritonik (three tones) angklung, tetra tonik (four tones) and pentatonic (five tones). This kind of angklung usually calls angklung buhun that means 'the old angklung' which had not been influenced by other elements. Until now, some villages still use angklung buhun in many ceremonies, such as pesta panen, ngaseuk pare, nginebkeun pare, ngampihkeun pare, seren taun, nadran, helaran, turun bumi, sedekah bumi, etc.
See Full Information about Traditional and Modern Angklung here:
Traditional Musical Instrument : Angklung.
Originally come from Indonesia.