 Mechanical
Music Digest™ Gallery |
| You Are Not Logged In | Login/Get New Account |
|
Please Log In. Accounts are free!
Logged In users are granted additional features including a more current version of the Archives and a simplified process for submitting articles. |
|
 |
 |
 |
 |
 |
 |
 |
MMD
Gallery
Tech
20er_gamma
|
|
End-of-Year Fundraising Drive In Progress. Please visit our home page to see this and other announcements:
https://www.mmdigest.com Thank you. --Jody
|
|
by Robbie Rhodes Total of 27 possible channels, labeled 0..26, in order of ascending pitch. Channel 13 lies on the center line of the paper. Channels 1..20 comprise the standard "Carl Frei" or "Raffin" 20-note scale employed by most 20-key organ builders. The use of the remaining channels is not standardized. paper width: 110 mm (4.33 inch) hole diameter: 3 mm (0.118 inch) channel spacing: 3.8 mm (0.15 inch) number of channels: 20 typical, 27 possible paper speed, typ.: 6 to 7 cm per second /1/ channel number /2/ note played by Jaeger & Brommer 20er Drehorgel, German music notation /3/ MIDI note number /4/ remarks /1/ /2/ /3/ /4/ 1 F 53F 2 B 58A# (B-flat) 3 c 60C "Middle C" 4 d 62D 5 ds 63D# (E-flat) 6 e 64E 7 f 65F 8 g 67G 9 a 69A 10 b 70A# (B-flat) 11 c' 72C 12 d' 74D 13 ds' 75D# 14 e' 76E 15 f' 77F 16 g' 79G 17 a' 81A 18 b' 82A# (B-flat) 19 c'' 84C 20 d'' 86D The image shows a portion of a 20er music roll, maker unknown, punched ca. 1998 for Jaeger & Brommer. The handwriting is by Wolfgang Brommer; he rejected this roll because of its poor quality. image file: 20er_c.jpg (43 kb, 150 dpi)
28 Auguest 2003 |
|
|
|
|
|
|
|
|
|
CONTACT FORM: Click HERE to write to the editor, or to post a message about Mechanical Musical Instruments to the MMD Unless otherwise noted, all opinions are those of the individual authors and may not represent those of the editors. Compilation copyright 1995-2024 by Jody Kravitz. Please read our Republication Policy before copying information from or creating links to this web site. Click HERE to contact the webmaster regarding problems with the website. |
|
|
||||||
|