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Envelope Functions for LTAS of different Pipe Organ Ranks and the influence of Pitch on Tonal Timbre

Proceedings of Meetings on Acoustics. Bd. XX. 2022 S. 1

Erscheinungsjahr: 2022

ISBN/ISSN: 1939-800X

Publikationstyp: Zeitschriftenaufsatz (Konferenzband)

Sprache: Englisch

Inhaltszusammenfassung


Long-term average sound spectra (LTAS) of organ pipes from different flue and reed ranks have been studied with the intention to obtain pitch-dependent LTAS models for the constant part of the pipe sound. The measured LTAS of each rank of pipes cover up to nine octaves within the tonal range C0…C9 . The envelope functions are piecewise linearly parametrized and serve as empirical approximations for the sound pressure levels of the harmonic partials. They allow for extrapolating the pitch ra...Long-term average sound spectra (LTAS) of organ pipes from different flue and reed ranks have been studied with the intention to obtain pitch-dependent LTAS models for the constant part of the pipe sound. The measured LTAS of each rank of pipes cover up to nine octaves within the tonal range C0…C9 . The envelope functions are piecewise linearly parametrized and serve as empirical approximations for the sound pressure levels of the harmonic partials. They allow for extrapolating the pitch range of most ranks and thus to explore these spectra beyond the physically existing compass of a rank. Two parameters for tonal timbre were calculated from the spectra: the first is a weighted average slope of the envelope function; the second is the spectral centroid of the sound spectrum. Each rank of pipes depicts as characteristic curve (from bass to treble) in a two-dimensional timbre chart, in which the different families of organ tone clearly separate from each other. The use of such timbre charts could assist in the work of pipe voicing by means of an electronic voicing device, which extracts the LTAS from the measured pipe sound and calculates the timbre chart from it. » weiterlesen» einklappen

  • sound spectra
  • timbre
  • pipe organ

Autoren


Höper, Nicols (Autor)

Klassifikation


DFG Fachgebiet:
Kunst-, Musik-, Theater- und Medienwissenschaften

DDC Sachgruppe:
Musik

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