Research Article Open Access

Pitch and Timbre Determination of the Angklung

Mohd Ridzuwary Mohd Zainal1, Salina Abdul Samad1, Aini Hussain2 and Che Husna Azhari1
  • 1 , Afganistan
  • 2 ,
American Journal of Applied Sciences
Volume 6 No. 1, 2009, 24-29

DOI: https://doi.org/10.3844/ajassp.2009.24.29

Submitted On: 27 October 2007 Published On: 31 January 2009

How to Cite: Zainal, M. R. M., Samad, S. A., Hussain, A. & Azhari, C. H. (2009). Pitch and Timbre Determination of the Angklung. American Journal of Applied Sciences, 6(1), 24-29. https://doi.org/10.3844/ajassp.2009.24.29

Abstract

This research describes the pitch and timbre determination of the angklung, a musical instrument made entirely out of bamboo. An angklung has two main parts: the frame and the rattle tubes. The pitch of the rattle tubes can be determined using a formula that takes into consideration the length and diameter of the air resonator. This is compared with the results obtained using sound analysis with the fast Fourier transform as well as with measured results. The coupling effects of having two rattles on the pitch and timbre are investigated. It is found that the pitch of the angklung is closely related to the fundamental frequency of air resonance in the bamboo tubes of the angklung rattles. Therefore, the pitch of an angklung can be estimated by calculating that fundamental frequency using information from the length and diameter of the closed cylinder air column of each rattle. The timbre of the angklung is also determined to be a mix of the sound output from each of its individual rattles. The timbre has an identifying characteristic of having two prominent peaks with each one corresponding to the pitch of each rattle.

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Keywords

  • Digital signal processing
  • music synthesis