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Comparison Study of Saron Ricik Instruments ’ Sound Color ( Timbre ) on the Gamelans of Nagawilaga and Gunturmadu from Karaton Ngayogyakarta Heru Kuswanto

The aim of this research is to compare the timbre spectrums of Saron Ricik Instruments of Gamelan Nagawilaga and Gunturmadu of Karaton Ngayogyakarta. These gamelans, as a set of traditional Javanese ensemble, are a pelog scale, seven scales in one octave. Sound of Saron Ricik Instruments is recorded by sound software. This software can display waveform in the time domain and spectrum in the frequency domain. The fundamental frequency is shown directly by the software. Other peak frequencies can be traced by shifting the cursor on the top of it. The accuracy of frequency that can be produced is 1 Hz Fundamental frequencies of Saron Ricik of Gamelan Nagawilaga are higher than of Gunturmadu. The locations of the harmonic frequencies are not always consecutive, but sometimes punctuated by another frequency. The number of harmonics or timbre of each instrument of Nagawilaga is different from the one of Gunturmadu..