Re: Welte T-100 Test Rolls (digest 950714)
By Robbie Rhodes
Zoli, thanks for the prompt reply from Europe, and I shall send for the book by Peter Hagmann.
Could you and Janos Macsai please examine your data, or the original roll at the National Museum, and provide answers for these questions concerning the Monteur-Rolle:
1. The initial playing velocity of the Red Welte roll is assumed to be 48 mm/sec (9.45 feet/minute, or "Tempo 94.5"). Can you confirm this?
2. Is there a handwritten pencil notation near the first perforation of the roll, giving the operator's name and date? Example: "Dieter 24.09.12".
3. What are the diameters of the larger and smaller holes of the Forzando-forte Rate Test? We have observed 2.0 mm and 1.7 mm respectively in existant copies in America, which are all from the middle 1920's.
4. The Forzando-forte Rate Test is repeated 3 times in both treble and bass, for a total of six occurences. It appears that, in all cases, the "Forzando-forte" command is intended to be issued simultaneously with the "Crescendo On" command. What variation do you observe when the six occurences are compared with each other? How close to simultaneous do they occur? What are the durations (slot lengths, in mm)? What is the desired end-value of this test? How is the end-value measured? I presume that the Monteur-Technician made adjustments upon the mechanism in order to bring it into conformance with a desired standard.
-- Robbie Rhodes < rhodes@foxtail.com > 15 July 1995
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(Message sent Sun 16 Jul 1995, 00:53:52 GMT, from time zone GMT-0700.) |
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