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An interesting tidbit related to why organs have “end correction:”
https://www.sciencenews.org/article/...-vibration-air
https://www.sciencenews.org/article/...-vibration-air
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Current: Allen 225 RTC, W. Bell reed organ, Lowrey TGS, Singer upright grand
Former: Yamaha E3R
https://www.exercisesincatholicmythology.com -
The photo from that experiment is priceless.-------
Hammond M-102 #21000.
Leslie 147 #F7453.
Hammond S-6 #72421 -
My first thought on seeing that photo was Pac-Man strikes again!
Larry is my name; Allen is an organ brand. Allen RMWTHEA.3 with RMI Electra-Piano; Allen 423-C+Gyro; Britson Opus OEM38; Steinway AR Duo-Art 7' grand piano, Mills Violano Virtuoso with MIDI; Hammond 9812H with roll player; Roland E-200; Mason&Hamlin AR Ampico grand piano, Allen ADC-5300-D with MIDI, Allen MADC-2110.Comment
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So, anyone want to speculate regarding why this phenomena exists? It also makes me wonder how scroll and slot tuning affects the open pipe "cap." The next question follows: Can this affect the voicing of a stop-OR, can the voicing of a stop affect this "cap?"
MichaelWay too many organs to list, but I do have 5 Allens:- MOS-2 Model 505-B / ADC-4300-DK / ADC-5400 / ADC-6000 (Symphony) / ADC-8000DKC
- Lowrey Heritage (DSO-1)
- 11 Pump Organs, 1 Pipe Organ & 7 Pianos
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Colin Pyket talks a little bit about the latest theories as to how a pipe makes sound in the articles on his website. The current "in vogue" theory is that the pipe resonates at a frequency, and this causes the air immediately around it to resonate. This air then causes the air not immediately around it to resonate as well. There is an exchange between those two air columns, and the exchange is dependent on a number of factors, with the most important factor being the shape of the pipe.
According to this theory, scrolls and slots increase the harmonics that are communicated into the air column further away, but wouldn't necessarily affect the fundamental pitch.
Current: Allen 225 RTC, W. Bell reed organ, Lowrey TGS, Singer upright grand
Former: Yamaha E3R
https://www.exercisesincatholicmythology.comComment
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Speaking of Dr Colin: "The acoustic radiation field of organ pipes" http://www.colinpykett.org.uk/acoust...organ-pipe.htm-------
Hammond M-102 #21000.
Leslie 147 #F7453.
Hammond S-6 #72421Comment
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