DOCSLIB.ORG

Flow Acoustical Determinants of Historic Flue Organ Pipe Voicing Practices

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Flow Acoustical Determinants of Historic Flue Organ Pipe Voicing Practices Proceedings of the International Symposium on Music Acoustics (Associated Meeting of the International Congress on Acoustics) 25-31 August 2010, Sydney and Katoomba, Australia Flow acoustical determinants of historic flue organ pipe voicing practices D.Steenbrugge Ghent University College, Ghent, Belgium PACS: 43.75.NP ABSTRACT Pipe organs sound differently depending on the regional and contemporary circumstances of their genesis. In order to adequately conserve them it is important, due to the scarcity of sources providing direct information on the building process and particularly on pipe voicing practices, to be able to specify as much as possible the factors that determine their sound signature. To this purpose an organized overview of some of these practices is proposed as a starting framework, exposed with reference to the classical flow-a- coustical flue pipe models developed by, among others, Cremer & Ising, Coltman, Elder and Fletcher. On the other hand, a method is presented to assess the tonal and musical effects of voicing configurations, using a 'voicing jack'-like system featuring a complete stop rank of experimental pipes with electronically controlled, continuously variable flue, mouth and toe hole geometry. On this play- able system the voicing (and tuning) of the pipes can be varied easily, rapidly, precisely and reversibly. In order to characterize spe - cific voicing strategies both approaches are combined by relating the musical significance associated with the test voicing configura - tions to corresponding values of a set of characteristic dimensionless ratios. Well-known voicing methods like open or closed toe and over- or underblown voicing are identified accordingly, as well as less common or builder specific procedures. INTRODUCTION • various tuning devices near the open end A better understanding of the operation of organ pipes can be • wall material and thickness and surface finish of considerable help in developing better conservation • upper labium geometry strategies of historic pipe organs. Although differences in • languid edge geometry tonal performance between instruments from different re- • nicks gions and builders are easily perceived, it's more difficult to • wind supply transients track these differences down to the material evidence. Pipe • various ear and roller beard geometries voicers traditionally are experts in just a few particular styles and feel uncomfortable and ignorant outside of these. On the other hand, physical and acoustical analysis of flue instru- ments operation is more involved with fundamental operating mechanisms and their modeling, and less with the esthetics BASIC VOICING PRINCIPLES involved with the differentiation of the model parameters. This paper , which attempts to give an overview of the great Determinants of flue organ pipe voicing variety of historic flue organ pipe voicing practices as found Although pipe organs seem to have a common origin, going in different regions and periods, does so by combining ele- back to the Greeks, by the end of the Middle Ages, when they ments from both worlds. A double approach will be used: seem to have been firmly established all over Western Europe voicing practices will be described in terms of the classical [Williams 2005 ], differences in climate and society culture flue instruments physical descriptions that have been de- inevitably led to differentiation in organ design. They were veloped ever since the XIXth century, with particularly im- mainly conceived for the churches, first for the smaller and portant progress in the 60's, 70's and 90's of last century. Spe- less reverberant Roman, later for the large stone-and-glass cifically, a number of dimensionless parameters will be selec- Gothic edifices. Accordingly they seem to have had to pro- ted with which voicing practices will be classified. And on duce rather large sound volumes, as testified by the early ap- the other hand, because the sensible ear remains a valuable pearance of the Blockwerk, which by the simultaneously measuring device in correlating or distinguishing sounds, an sounding many pipes per note of widely differing pitch (su- experimental setup will be presented which focuses on the peroctaves and -fifths), fully took into account the masking perceptive and esthetic qualities of voicing schemes. This ap- properties of the ear. In this period they all had in common proach might make up for some of the difficulties en- the use of low wind pressure and flow rate, because of eco- countered in trying to identify with confidence certain sound nomies of number of necessary bellows and man-power and qualities in the extant historic evidence. less problems with leaks which tend to get worse with in- The scope of this paper is limited to flue organ pipes, more creasing pressure. specifically the so-called medium-scaled (open) principals Low wind pressure has more advantages: which form the heart of every organ. Attention will be given – Lower action force necessary mainly to the voicing practices associated with the mouth re- gion, thus excluding influences of: ISMA 2010, associated meeting of ICA 2010 1 – Easier to voice because irregularities tend to be diameter halving occurring at the 16th to 18th pipe instead of smoother. the 13th. Disadvantages however were: Quick voicing opposes rich timbre – A less powerful sound, countered as much as pos- Another law which is reminiscent of similar observations in sible by the 'widely different pitches' principle other instruments, like in strings or percussion. As to its rel- – Attempting to minimize air consumption meant evance in flue organ pipe voicing, it will be studied further in voicing with narrow flues, so that it's more difficult conjunction with the jet angle parameter. to obtain both equalized loudness and timbre throughout the range – Dust accumulation in narrow flues disturbs opera- tion FLOW-ACOUSTICAL DETERMINANTS OF – The loudness and brilliance of reeds suffers particu- FLUE ORGAN PIPE VOICING larly Accordingly the early pipe organs, like the Blockwerk, min- Introduction imized wind consumption by: – In this section a set of dimensionless parameters is defined, using a 'synthetic' tonal design which not necessar- by means of which an attempt will be done to characterise ily contained reeds – various voicing practices. They are based on the classical implementing relatively weak basses (often with models of flue instrument operation that have been developed short octave) since the 1960's. A thorough evaluation of their validity and – using open foot and narrow flue voicing utility, by means of extensive measurements on the variable The gradual evolution towards organs with more 'gravitas' is mouth geometry pipes set, will be the subject of future re- thus another demonstration of the close interaction between ports. esthetics and technology. Voicing practices, as was every part of the organ design, were also determined by the intended use of the instruments. Inharmonicity parameter Dinharm In Italy and France the organ served to embellish the liturgic- The inharmonicity of the passive pipe resonances is determ- al service, for instance through the alternatim practice. In the ined by the ratio a/L, where a is the pipe's radius and L its former country the organ was treated rather as an alternative length, and the ratio of pipe cross-sectional area to mouth to the voice, in the latter is was precisely supposed to provide area Sopenend/Smouth. a/L can equivalently be written as Sopen- 1/2 a contrast to the sung parts. With the advent of the Lutheran end /L, so that combining both leads to the introduction of the church in Northern Germany an instrument capable of ac- inharmonicity determinant: 1/2 companying the community singing was needed. Besides Dinharm= Sopenend/(Smouth L) these liturgical conditions the sound of the organ was also Because the end corrections increase with increasing a, and impregnated with the treats peculiar to a people's culture: the are smaller for the higher resonances, wider pipes and pipes classical French organ reflected the splendor and wealth of having small mouths will sound less rich than narrower pipes. the Sun-king's court, the North German organ the order and Accordingly, because their radiated acoustic energy is spread multilayered-ness of this society consisting of Church and over a larger spectrum the latter will therefore tend to sound State, patricians and peasants. louder. On the other hand the sound of the former, with their acoustic energy more concentrated in the very first harmon- ics, will carry a larger distance. The fundamental voicing laws Establishing this determinant for a pipe register constitutes a Certain voicing laws seem to be universally applicable and fundamental problem in pipe organ design, the goal being to find their equivalents elsewhere in music practice. Before find a row of pipes which is sufficiently balanced in loudness turning into the details of pipe voicing adjustments it's inter- and timbre throughout its range. Assuming a to scale like f -x esting to briefly mention some of the more widely accepted and with the usual pipe geometries, an equalized loudness of these laws and possibly try to interpret them from an level throughout the range can be obtained when x varies acoustical viewpoint. from .87 to .67 going from bass to treble [Fletcher & Rossing In highly reverberant rooms bass notes are favored 1998, Steenbrugge 1997]. These values lie around the so-c- In accordance with the rule of thumb, that the longest (open) alled normal scale with x=.75. pipe of the organ should fit about 16 times in the largest dis- As both the mouth [Ingerslev & Frobenius 1974] and open tance the sound can travel uninterrupted, the ability of a end corrections [Levine & Schwinger 1948] scale with a in sound wave to perform sufficient reflections seems to 1-x pipes with the usual proportions, Dinharm scales like f . This sharpen the aural attention to this frequency. In small rooms implies that only geometrically similar pipes, with x=1, will this becomes difficult for low frequencies and they are per- show the same resonance positions relative to their respective ceived with less acuity than the treble sounds.
Load more

Recommended publications
  • Modern Organ Stops
    Modern Organ Stops MODERN ORGAN STOPS A practical Guide to their Nomenclature, Construction, Voicing and Artistic use W ITH A GL OSSARY OF TE CHNICAL TE RMS relating to the Science of Tone-Production from Organ Pipes B Y T H E R E V E R E N D N O E L A . B O N A V IA -H U N T , M.A. PEMBROK E COLLEGE, OX FORD (Author of ≈Studies in Organ Tone,∆ ≈The Church Organ,∆ & c.) ≈Omne tulit punctum qui miscuit utile dulci.∆ƒ HORACE: ≈Ars Poetica.∆ BARDON ENTERPRISES PORTSMOU TH First published by Musical Opinion, 1923. Copyright, © 1923 by Musical Opinion Copyright, this edition © 1998 by Bardon Enterprises This edition published in 1998 by Bardon Enterprises, reproduced by permission All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior permission of the copyright owners. ISBN: 1-902222-04-0 Typeset and printed in England by Bardon Enterprises. Bound in England by Ronarteuro. Portsmouth, Hampshire, England. Preface HE issue of this book is due wholly to the desire to place before the student a guide, sufficiently concise, and withal adequately Tcomprehensive, to the clearer understanding of the science of or- gan tone-production. To the casual observer the alphabetical ar- rangement of stop-names would seem doubtless to convey the impres- sion that yet a third dictionary of organ stops has been offered to the public. A closer scrutiny, however, should convince the reader that these pages do not seek to cover the same ground occupied by the ex- cellent treatises of W edgwood and of Audsley, but will, it is hoped, reveal the true aim and scope of the author.
    [Show full text]
  • Protégé™ Chamber Series™ CF-2A, C3a & C-6
    Protégé™ Chamber Series™ CF-2a, C3a & C-6 CF-2a, C-3a and C-6 Copyright © 2003 Allen Organ Company All Rights Reserved AOC P/N 033-00105 Revised 6/2/05 ALLEN ORGAN COMPANY For more than sixty years--practically the entire history of electronic organs-- Allen Organ Company has built the finest organs that technology would allow. In 1939, Allen built and marketed the world’s first electronic oscillator organ. The tone generators for this instrument used two hundred forty-four vacuum tubes, contained about five thousand components, and weighed nearly three hundred pounds. Even with all this equipment, the specification included relatively few stops. By 1959, Allen had replaced vacuum tubes in oscillator organs with transistors. Thousands of transistorized instruments were built, including some of the largest, most sophisticated oscillator organs ever designed. Only a radical technological breakthrough could improve upon the performance of Allen’s oscillator organs. Such a breakthrough came in conjunction with the United States Space Program in the form of highly advanced digital microcircuits. In 1971, Allen produced and sold the world’s first musical instrument utilizing digitally sampled voices! Your organ is significantly advanced since the first generation Allen digital instrument. Organs with Renaissance™ technology are the product of years of advancements in digital sound and control techniques by Allen Organ Company. This system represents the apex of digital technology applied to exacting musical tasks. The result is a musical instrument of remarkably advanced tone quality and performance. Congratulations on the purchase of your new Allen Organ! You have acquired the most advanced electronic organ ever built, one that harnesses a sophisticated custom computer system to create and control beautiful organ sound.
    [Show full text]
  • The 1930 Skinner Organ 8 September 2006 — Page 
    JEFF WEILER PIPE ORGAN CURATORS, CONSERVATORS & CONSULTANTS PLANNING & PROJECT MANAGEMENT VOICING & TONAL FINISHING 1845 SOUTH MICHIGAN AVENUE #1905 CHICAGO, ILLINOIS 60616 312.842.7475 [email protected] jlweilerpipeorgans.com t h e 1930 Skinner Organ i n Sinclair Auditorium, Coe College cedar rapids, iowa Site survey and visits: 7-11 august 2006 Report submitted: 8 september 2006 Sinclair Auditorium, Coe College — the 1930 Skinner Organ 8 September 2006 — page 2 INTRODUCTION This report comes at the request of Dr. Brett Wolgast. It comprises an historic overview, a survey the organ, a report of existing conditions, and recommendations for the immediate care and ultimate restoration of the Sinclair Auditorium organ. To prepare this document, Jeff Weiler and Jonathan Ambrosino spent August 6 to August 10, and the morning of August 11: • playing the organ, inspecting the pipework, surveying mechanism and photo- The organ contains thousands of pipes, most of metal but documenting conditions; some of wood. These are in the Swell organ. • opening up windchests to determine the state of the internal leather; • creating an inventory of pipes stored in the basement; • removing the non-original Great Trumpet and reinstating the original First Open Diapason, formerly stored in the basement (the Trumpet stop was put into a storage box and arrayed in the basement storage area); • through-tuning all 57 ranks; • meeting with Brett Wolgast, Bill Carson and Dick Harmon to discuss the organ’s history, present and future. This document is a prolonged snapshot of the organ over a week’s visit. Our impressions here blend with experience from other Skinner organs to appreciate and describe its present condition.
    [Show full text]
  • Theatre Owner's Manual
    TH-202/TH-302 Theatre Models IMPORTANT! Organs which contain GeniSys™ technology no longer include the GeniSys™ Controller Guide within the model specific Owner’s Manual. The correct GeniSys™ Controller Guide must be downloaded and/or printed separately. Please check the CODE version of the software installed within the organ to determine which version of the GeniSys™ Controller Guide is required. The CODE version is briefly displayed within the GeniSys™ Controller’s LCD display when the organ starts up. Copyright © 2016 Allen Organ Company All Rights Reserved AOC P/N 033-00221-1 Revised 10/2016 ALLEN ORGAN COMPANY For more than sixty years--practically the entire history of electronic organs-- Allen Organ Company has built the finest organs that technology would allow. In 1939, Allen built and marketed the world’s first electronic oscillator organ. The tone generators for this instrument used two hundred forty-four vacuum tubes, contained about five thousand components, and weighed nearly three hundred pounds. Even with all this equipment, the specification included relatively few stops. By 1959, Allen had replaced vacuum tubes in oscillator organs with transistors. Thousands of transistorized instruments were built, including some of the largest, most sophisticated oscillator organs ever designed. Only a radical technological breakthrough could improve upon the performance of Allen’s oscillator organs. Such a breakthrough came in conjunction with the United States Space Program in the form of highly advanced digital microcircuits. In 1971, Allen produced and sold the world’s first musical instrument utilizing digitally sampled voices! Your organ is significantly advanced since the first generation Allen digital instrument.
    [Show full text]
  • The Rodgers 579Is the Most Full-Featured 2 Manual Organ You'll
    The Rodgers 579 is the most full-featured 2 manual organ you’ll find in its class, built with the same high-quality cabinet and extra features that come in larger models, including double expression, crescendo pedal, 10 toe pistons, expanded voicing capability and powerful tone generation system. Organists will appreciate the useful Organ Type piston that instantly calls up any of four sets of stops, while still allowing the selection of any desired alternative from Voice Palette™ or User Voices. Manual I (Great) Couplers: II/I (SW to GT) Specifications Tablet VP1 VP2 VP3 29 stops / 241 total voices Bourdon 16’ Violone 16’ Principal 16’ Quintaton 16’ 29 primary voices Principal 8’ Open Diapason 8’ Montre 8’ Prinzipal 8’ 87 Voice Palette™ voices Gemshorn 8’ 2nd Diapason 8’ Voce Umana II 8’ Aeoline 8’ 92 User pipe organ voices Gedackt 8’ Clarabella 8’ Flûte Harmonique 8’ Bourdon 8’ 32 User orchestral voices Octava 4’ Principal 4’ Flûte à Bec 4’ Fugara 4’ Chimes Rohrflöte 4’ Open Flute 4’ Lieblichflöte 4’ Kleine Gedackt 4’ General Pistons: 10 Quinte 2-2/3’ Twelfth 2-2/3’ Nazard 2-2/3’ Quintaden 8’ Divisional Pistons: 5 Great, 5 Swell Superoctav 2’ Fifteenth 2’ Doublette 2’ Piccolo 2’ Toe Pistons: 10 configurable Mixtur IV Tierce Mixture V Cornet V Rauschquint IV Couplers: 3 plus 6 User/MIDI Controls Trumpet 8’ Waldhorn 8’ Trompette 8’ Cromorne 8’ Bass and Melody Couplers Chimes Tremulant: 2 Tremulant Shoes: 2 Expression, Crescendo Manual II (Swell) Memory: 20 levels x 20 pistons (400) Tablet VP1 VP2 VP3 Console dimensions: Spitz Geigen 8’
    [Show full text]
  • Equalizing and Voicing Understanding the Power of the Inspire Menus
    EQUALIZING AND VOICING UNDERSTANDING THE POWER OF THE INSPIRE MENUS RODGERS INSTRUMENTS US LLC TABLE OF CONTENTS INTRODUCTION ..........................................................................................................................2 PREPARING THE ORGAN FOR EQUALIZING ....................................................................3 Quick Menu User and Service Menu .........................................................................................3 Speaker Setup ............................................................................................................................5 Channel Volumes .......................................................................................................................6 Audio Test ..................................................................................................................................7 Master Volume ...........................................................................................................................7 Matrix Mixer ..............................................................................................................................8 Room Type and Reverb Volume ................................................................................................9 Default Voices ..........................................................................................................................10 Save Settings ............................................................................................................................12
    [Show full text]
  • JANUARY 2017 First United Methodist Church Dalton, Georgia Cover
    THE DIAPASON JANUARY 2017 First United Methodist Church Dalton, Georgia Cover feature on pages 24–25 CHRISTOPHER HOULIHAN ͞ŐůŽǁŝŶŐ͕ŵŝƌĂĐƵůŽƵƐůLJůŝĨĞͲĂĸƌŵŝŶŐ performances” www.concertartists.com / 860-560-7800 Mark Swed, The Los Angeles Times THE DIAPASON Editor’s Notebook Scranton Gillette Communications One Hundred Eighth Year: No. 1, In this issue Whole No. 1286 The Diapason begins its 108th year with Timothy Robson’s JANUARY 2017 report on the Organ Historical Society’s annual convention, Established in 1909 held in Philadelphia June 26–July 2, 2016. We also continue Joyce Robinson ISSN 0012-2378 David Herman’s series of articles on service playing. John Col- 847/391-1044; [email protected] lins outlines the lives and works of composers of early music www.TheDiapason.com An International Monthly Devoted to the Organ, whose anniversaries (birth or death) fall in 2017. the Harpsichord, Carillon, and Church Music John Bishop and Larry Palmer both examine the year and editor-at-large; Stephen will now take the reins as editor of The the season. Gavin Black is on hiatus; his column will return Diapason. I will assist behind the scenes during this transition. CONTENTS next month. Our cover feature is Parkey OrganBuilders’ Opus We also say farewell to Cathy LePenske, who designed this 16 at First United Methodist Church, Dalton, Georgia. journal during the past year; she is moving on to new respon- FEATURES sibilities. We offer Cathy many thanks for her work in making Thoughts on Service Playing Part II: Transposition Transitions The Diapason a beautiful journal, and we wish her well. by David Herman 18 As we begin a new year, changes are in process for our staff OHS 2016: Philadelphia, Pennsylvania at The Diapason.
    [Show full text]
  • Protégé™ LD-34 Owner's Manual
    Protégé™ LD-34 Owner’s Manual Copyright © 2012 Allen Organ Company LLC All Rights Reserved AOC P/N 033-00169 Revised 04/2012 ALLEN ORGAN COMPANY For more than sixty years--practically the entire history of electronic organs-- Allen Organ Company has built the finest organs that technology would allow. In 1939, Allen built and marketed the world’s first electronic oscillator organ. The tone generators for this instrument used two hundred forty-four vacuum tubes, contained about five thousand components, and weighed nearly three hundred pounds. Even with all this equipment, the specification included relatively few stops. By 1959, Allen had replaced vacuum tubes in oscillator organs with transistors. Thousands of transistorized instruments were built, including some of the largest, most sophisticated oscillator organs ever designed. Only a radical technological breakthrough could improve upon the performance of Allen’s oscillator organs. Such a breakthrough came in conjunction with the United States Space Program in the form of highly advanced digital microcircuits. In 1971, Allen produced and sold the world’s first musical instrument utilizing digitally sampled voices! Your organ is significantly advanced since the first generation Allen digital instrument. Organs with Renaissance technology are the product of years of advancements in digital sound and control techniques by Allen Organ Company. This system represents the apex of digital technology applied to exacting musical tasks. The result is a musical instrument of remarkably advanced tone quality and performance. Congratulations on the purchase of your new Allen Organ! You have acquired the most advanced electronic organ ever built, one that harnesses a sophisticated custom computer system to create and control beautiful organ sound.
    [Show full text]
  • Organ Study at Wheaton College
    ORGAN STUDY AT WHEATON COLLEGE Program The goal of our organ program is to prepare students for rewarding careers in organ performance and church music. Not only do students study great organ literature, but also the arts of improvisation and service playing, continuo playing, and conducting. Students are offered courses in Church Music and Hymnody, Bible and Theology, as well as Music Pedagogy, thus training well-rounded musicians, fully equipped to take their places as a leaders in music ministry, and prepared to enter the best graduate schools in the nation. We also take advantage of the rich musical culture in the greater Chicago area, with field trips and concerts. Our website: www.wheaton.edu/Conservatory/ Faculty Professor of Organ and College Organist, Dr. Edward Zimmerman, heads our organ program. He holds the Doctor of Musical Arts degree from the Eastman School of Music, and has presented concerts and lectures throughout the United States and Europe. His research on the liturgical organ music of Alexandre Guilmant is published in the anthology French Organ Music since the Revolution to Franck and Widor, by the University of Rochester Press, and his double CD of rare nineteenth century organ music, Germania, is now available. He is enthusiastic about teaching, and has built a strong and exciting organ program at Wheaton. CONTACT HIM at [email protected] The Instruments Students have available to them a wide range of organs, including the spectacular Casavant organ in Edman Chapel. Comprising 50 stops and 70 ranks, four manuals and pedal, mechanical key action with electric stop action, plus double consoles, the organ is the largest of its type in the metropolitan area, and singular among colleges and universities across the nation.
    [Show full text]
  • Acoustics of Organ Pipes and Future Trends in the Research
    Acoustics of Organ Pipes and Future Trends in the Research Judit Angster Knowledge of the acoustics of organ pipes is being adopted in applied research for supporting organ builders. Postal: Fraunhofer-Institut für Bauphysik (Fraunhofer Institute for Introduction Building Physics IBP) The pipe organ produces a majestic sound that differs from all other musical in- Nobelstrasse 12, 70569 struments. Due to its wide tonal range, its ability of imitating the sound of vari- Stuttgart, Germany ous instruments, and its grandiose size, the pipe organ is often called the “king of musical instruments” (Figure 1). The richness and variety of sound color (timbre) Email: produced by a pipe organ is very unique because of the almost uncountable pos- [email protected] sibilities for mixing the sounds from different pipes. According to the art of sound generation, there are two kinds of pipes in the organ that are similar in function Péter Rucz to other wind instruments: flue (labial) pipes and reed (lingual) pipes. Although Postal: this article focuses on sound excitation by flue pipes, the role of reed pipes is brief- Budapest University of ly mentioned (see Figure 2). The article also shows how the connection between Technology and Economics sound character and pipe shape and dimensions can be understood, and it also Magyar tudósok krt. 2, 1117 considers the trends in the research that focus on helping organ builders in their Budapest, Hungary practical work. Email: Structure of the Pipe Organ [email protected] A sketch of a pipe organ is shown in Figure 3. Its main parts are the windchest with the pipes, the wind system, and the control system (keyboard, tracker action, András Miklós and drawstops; Figure 2).
    [Show full text]
  • Organ Stop Layout
    CATHEDRAL RUFFATI ORGAN PIPE AND DIGITAL STOP LIST Pipe Stop PEDAL Pipe Reed Stop Digital Stop Clarion 4’ Rschlmei 4’ Trumpet Clarion 4’ 8’ Bombarde 16 Contra Contrabombarde Fagotta 16’ 32 Basson 16 Cbombarde 32 Octavin 2 CTrptte 16’ CBasson 32 Nachthorn 4’ Super Octave 4’ Choralbass 4’ Mixture Nachthorn 4’ Flute 8’ Subbass 16 Bordun 16’ Octave 8 Gedeckt Pommer 16 Bourdon 16’ Principal 16’ Principal 16’ Open Wood 16’ Contra Bourdon 32 TO ACCESS THE DIGITAL STOPS 1. Hold SET Button and pull draw knob of piston you wish to access 2. Use dial on right side of organ to select voice. Most have 2 voices, some have more. 3. Depress E to access the digital voice along with the pipe voice located on that drawknob 4. Depress P to mute the pipe sound and use only digital on that manual 5. Always depress “EXP on” piston to gain complete control over the volume of the organ with the sw/ch pedals 6. The “P” and “E” pistons on Great controls the pipe digital divisions for the manual as well as the pedal CATHEDRAL RUFFATI ORGAN PIPE AND DIGITAL STOP LIST SWELL Tremulant Unison Off Affects digital stops also Swell Swell 16 4 Vox Humana Clarion 4 V Humaine 8’ Clairon 4 Strings Clarion 4 Slow Strings Trompette 8 Trompette 8 Oboe 8’ Trumpet 8 Hautbois 8 Htbois 8 Tierce Contra 1 3/5 Fagotto 16 Tierce 1 3/5 Basoon 16 Cymbale III Fourniture C Trptte 16 IV Doublette 2’ Nazard Flauto 2 2/3 Venezian 4 Principal 4 Prestant 4 Unda Maris Gedeckt 8’ Bourdon 8’ Fl Harm 8 Viola Celeste 8’ Viola Pomposa 8 Diapason 8 Geigen Principal 8’ Gedect Pommer 16 Bdn Doux 16 C Gambe
    [Show full text]
  • Tracing Seven Hundred Years of Organ Registration 1300 – Present ---SCW (2010)
    Tracing Seven Hundred Years of Organ Registration 1300 – Present ---SCW (2010) . portions used for ALCM Conference workshop, “This, That, Neither, or Both,” June 2012, Bethlehem, PA, So, this all started when a student asked me questions about Spanish music about which I had not a clue . just think what would happen if they asked me about something really complicated!! _________________ 12 th century Theophilus, a monk, documented an organ that contained an ensemble of pipes speaking in octaves and fifths known as a Blockwerk , literally a ‘block of sound’ from which individual ranks could not be separated. 14 th and 15 th centuries – Late Medieval Organs Multiple manuals and split-chest systems enabled separating the Principal ranks from the higher Mixture sounds. By the 14 th century, there were pedals, fully chromatic keyboards, and tripartite façade arrangements accommodating large ‘bourdon’ or ‘tenor’ pipes. By the 2 nd half of the 14 th century, there was the addition of secondary manual and pedals on separate actions and wind chests. For organs built c. 1350-1400 (which can be translated to modern organs): >simple organ would be a Blockwerk of Mixtures, probably based on 4-foot pitch >double organ would add an octave lower at 8-foot pitch >RH would probably feature a decorative treble voice on the Blockwerk sound, while the LH on the ten lowest keys would sound the tenor on sustained Principals >the organ could be played so that only the ten tenor keys of the main manual were doubled an octave lower >4-foot Principal stops on a separate manual is an option >8-foot plenum for the tenor on one keyboard with other voices on the 4’ plenum Organ built in 1361, renovated in 1498, described by Praetorius: >two upper manuals were called Diskant with 22-note chromatic compass >third manual or Bassklavier had 12 keys from B to b >pedal had the same one-octave compass The Principal chorus of inseparable registers is the most heavily documented type of late- medieval organ.
    [Show full text]