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1

STABILITA LADENIA ORGANOV

100%
Nagy Š., Štafura A.
Musicologica Slovaca
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2012
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vol. 3 (29)
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issue 2
254 – 264
EN
The article is concerned with the stability of the tuning of historic organs which have their air system supplied, in terms of the positioning of the instrument itself, from an external environment. It addresses the question of the temperature changes in sacred buildings, which are an essential magnitude for the analysis. The analysis also touches on the mode of the construction used for the air system, since this construction has a fundamental influence on the constant change of pressure and air temperature in the air system. We have verified the entire analysis in situ under real conditions, also by means of an experiment regarding the analysis of tuning. The positioning of the air system, sucking in air which differs in temperature from the air where the instrument itself is positioned, does not have any destructive effect on the tuning of the historic organs and hence does not damage this tuning in any way.
2

HODNOTENIE DREVA ORGANOVÝCH PÍŠŤAL Z POHĽADU FREKVENČNÉHO SPEKTRA ZVUKU PÍŠŤAL A FYZIKÁLNO-AKUSTICKÝCH CHARAKTERISTÍK

81%
Štafura A., Nagy Š., Čulík M.
Musicologica Slovaca
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2014
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vol. 5 (31)
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issue 1
88 – 114
EN
This paper aims at an experimental evaluation of the quality of the wood used in the manufacture of wooden organ pipes. For this purpose we created a stock of pipes, using various types of wood for the walls of the pipes and for the front board. Using this trial stock of pipes, we conducted a series of experimental measurements, proceeding from an analysis of the sound spectrum. It was shown that what exerts the most fundamental influence on the quality of the sound spectrum is the measure of the pipe and its intonation. This reality is confirmed by the fact that despite the use of varying materials and varied thickness of walls, under constant conditions (pressure, temperature) the resonance mode of all the pipes examined is at the same frequency. A further finding is that the material of the front board and walls may have an influence on the creation of a disturbing (humming) component of the tone of the pipe under certain conditions and circumstances, and indeed on the creation of harmonic tones. Even a small change in the original tuning of a historical pipe causes relatively marked changes in the actual sound system of the pipe. This fact has significant consequences in the field of restoring historical organs and on changes to the tuning of those instruments.
3

ORGANOVÝ POZITÍV V SÁSE A VÝZNAM KOMPLEXNÉHO ORGANOLOGICKÉHO VÝSKUMU

81%
Štafura A., Nagy Š., Beronská N.
Musicologica Slovaca
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2015
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vol. 6 (32)
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issue 2
215 – 249
EN
The paper contains new information about the positive organ in the village of Sása (district of Revúca). The following facts were determined by analysis: the identity of the organ-builder Michal Kiszely; an approximate dating of the instrument’s construction to the 1820s; and the instrument’s precise disposition. An examination of the scaling of all registers showed a resultant scale proportion of 5:8, and also a secondary raising of the cut-up in all registers. From material research of the wooden registers it was found that resonance wood was not used; the resonant Norway spruce was used for a small part of pipes. Tis material will enable us to date the instrument’s construction with the help of dendrochronology. The metal registers from the organ’s metallic part are composed of an alloy in the proportion of 65% tin and 35% lead. Apart from degradation by woodworm, the original intonation has suffered also damage, as shown by analysis of the frequency spectrum of sound in all registers. The pitch needs to be retuned in the wooden as well as in the metal registers. Our summary organologic findings concerning this instrument can be used in further application outputs.
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