RANCANG BANGUN INSTRUMEN PORTABLE PENGUJI LARAS GAMELAN BERBASIS MIKROKONTROLER

Research on the tone gamelan laras slendro has been conducted to determine the regularity of the pattern of tone gamelan laras slendro and manufacture of testing instrument gamelan tunings based microcontroller. In this study, the fundamental frequency tone gamelan sound was obtained from the analysis with the analysis of Fast Fourier Transform (FFT) using Sound Forge 6.0 software. Regularity was obtained by comparing frequency of gamelan high tone with tone underneath. It was used to determine the standard tone using tone 1 octave I as a basic tone. Tunings of gamelan instrument microcontroller based testers are used to measure the frequency of the tone gamelan, sets the tone and condition of the gemelan tunings. The results of the analysis obtained regularity gamelan laras slendro has a pattern similar to that shown Nugraha. Distance between gamelan laras slendro equal to that obtained Kunts of 240 cents. Tunings of gamelan instrument testers have been made to have high accuracy with 0,13% of measurement innaccuracy and precission of 0%. Tunings of gamelan instrument testers have a range of measurement frequency 70 Hz - 20,000 Hz at intervals and resolutionof 1 Hz. The sensitivity of the instrument measuring the frequency of 1. To measure the condition of the gamelan tunings instrument is designed to have accuracy of ± 1% of the standard tone