─ 16 ─of frequency can be randomly set, while 0.5Hz was used at this time.With the A4 pitch at 440 Hz, the frequency of each key, f Hz, is converted into the cent unit to indicate each pitch with equal temperament of 12 degrees in western music. The pitch of Gamelan Pelegongan owned by ISI is indicated in Table 1 as an example. The interval has four octaves, and because of the pentatonic scale, the last pitch name in the rst octave is indicated as 1-6. As explained in the above, the pitch is indicated with the pitch name in equal temperament of 12 degrees, and ± represents the cent difference. For example, the pitch of the pitch name 1-1 is C#3; however is 48 cents higher. The pitch of each pentatonic scale for four octaves is eventually averaged for comparison purposes. The error range of nal analysis results with frequency resolution capability of 0.5Hz was within ±2 cents, i.e., there is no significant inuence.6. Measurement results and discussionPitches of Gamelan Pelegongan from Sets A to K are indicated in Table 2. The data on Gamelan Gong Kebyar made by Beratha in 1969 and owned by ISI is indicated as Set L for reference.When Set A of Gamelan Pelegongan owned by ISI is compared with Set L of Gamelan Gong Kebyar (both of them were made by Beratha), pitches of the former are arranged in the order of C#, D#, E, G#, and A# from the lowest pitch, and that of the pitch name 5 is 40-cent higher compared with the latter; however the ve tones for both are almost equal with no signicant difference. Based on the above, it is likely that Gamelan Pelegongan was made around 1990 in reference to Gamelan Gong Kebyar with the same pelog scale made in 1969. Since the pitch of the pitch name 5 of Gamelan Gong Kebyar made around 1990 tends to be tuned higher than that of ISI1), that of the pitch name 5 of Set A of Gamelan Pelegongan was probably tuned 40-cent higher than Set L in the same way.For Sets H, I, and J with Trompong that are originally categorized as Gamelan Semar Pegulingan, the pitch of the pitch name 1, the lowest pitch in ve keys, is D#. For other Gamelan Pelegongans with no Trompong, that of the pitch name 1 is basically D or C# except Set K. In particular, it is C# for those made after 1930. Therefore, the pitch of the pitch name 1 of Gamelan Pelegongan made as Gamelan Semar Pegulingan to play instrumentals in those days was basically D#. As they began to be used to accompany dance such as Legong dance and Barong dance in the 20th Century, Gamelan Pelegongan tended to be made with a lower pitch. Various reasons can be considered, e.g., the pitch goes lower as the sound of music that accompanies energetic and strong Barong dance is louder and their instruments need to be made largely and solidly, D# for the pitch name 1 is too high and difficult to sing when lyrics are added to dance accompaniment, etc., while it is difficult to judge unconditionally. Measurement data is to be increased for further consideration in the future.Regarding Set K of Gamelan Pelegongan in Banjar Taman Table 2 The Pitches for the 11 sets of Gamelan Pelegongan and one set of Gamelan Gong Kebyar＊1)SetOwnerYEAR1 (cent)2 (cent)3 (cent)5 (cent)6 (cent)AISIca. 1990C#＋47D#−38E＋16G#＋20A#−49BBlah Kiuhpre.1950C#−34D＋12E−18G＋46A−37CAbian Nangka Kajapre.1936C#−1D＋45E−3G#−15A−3DMeranggica. 1935C#−45D−15E♭＋33G＋19A♭＋20EKlandisearly 1930sC#＋47D#−21F−19G#＋30A＋37FCarik Tistaca.1937C#＋45D#−31F−40G#−5A＋31GTunjuk (Leko)pre.1925D＋34E♭＋42F＋0A−21B♭＋8HKetewel18-19th cent.D#＋18F#＋5G#−34C−41C#＋15ITeges Kanginan19th cent.D#＋14F−9G♭−9A#−24B＋10JBongan Jawapre.1950D#＋1E＋37F#＋2A#−40B−4KTamanpre.1930sF−9G♭＋41A♭−26C＋3D♭＋27LISI (Gong Kebyar)1969C#＋43D#−30E＋26G#−20A＋12＊1) Some data are different from those in literature 5) as all of data had been reanalyzed and recalculated.
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