•-- non-subscriber, please reply to sender and MMD -- While browsing in a local antique shop I found a Clariona Reed-Pipe crank organ that visually is in very nice shape. The paper labels are perfect. I did not realize until reading in the MMD Archives that it is missing the "reed pipe resonator ass...

•In my slowly proceeding street organ project I finally filled some empty spaces with a 20-note percussive harp, a project that of course took much more work than originally planned, all spare time this year. For your discouragement or enlightenment I have written a technical article about this desi...

•I'm looking for a Wurlitzer Brass Trombone bass pipe "G" resonator. The brass "horn" resembles the last section of a tenor (slide) trombone except there's a 90-degree turn just before the flared bell. The resonator is 30 inches long. The bottom (narrow) entrance opening of the resonator is 3/4" wid...

•The patented Centripetal Tension Resonator in Mason & Hamlin grands was intended to preserve the crown of the soundboard in a new instrument and raise it, if necessary, after the piano had settled following several changes of season. It's probably best to leave it alone except in the course of doin...

•I dug up some more information concerning the Centripetal Tension Resonator in Mason & Hamlin grands. This comes from Alfred Dolge's book, "Pianos and their Makers", published in 1911 by Covina Publishing Co., Covina, California, pages 109-111. The "Tension Resonator for Pianos" was invented by Ric...

•I'm no physicist but I have read about the Helmholtz resonator as a means of disposing of noise you don't want. Perhaps there is a place for the principle in the design of pump housings? In the electronic equivalent of phasing out, noise-cancelling headphones work well in airplanes and also when I'...

•The Wurlitzer company made a few sets of 32-foot Diaphone pipes where each resonator was set up with flap valve doors so they only had six pipes for the bottom octave -- each pipe could play two notes. There is an operating set of these Wood Diaphone pipes in the Berkeley Community Theater organ in...

•The marimbas I've seen in several US high school and college concert bands have had no buzzers in the resonator. They have a more mellow sound than a xylophone but no buzz. I wonder if there are several variations on this instrument? Mike Blackwell [ Probably lots! The makers and musicians of Chiap...

•All Reed organ pipes have a vibrating reed which controls the sound produced. The vibrating reed is usually made of soft brass. The vibrating reed is necessarily tuned to approximate in pitch the inner sympathy of the air mass in it's resonator. The length of the vibrating portion of the reed is ch...

•There seems to be some confusion in this discussion of reeds. There are reed organs using metal reeds to create pipe tone. (The reed is encased in a pipe shape resonator, or wooden box like chamber to enhance the sound) There are pipe organs that use metal, (usually brass) reeds in the base of thei...

•It is possible that the loudspeaker in the phone doesn't deliver the same pitch at different angles, but it seems more likely that the ear is a more closed resonator when the phone is right up to it, and more open when it is tilted away. The ear does keep growing as we age, so if this is the explan...

•I read in the Archives about someone adding wooden trombones to a style 105 band organ. I have Doyle Lane's book of Wurlitzer pipe data, but I am not sure of the resonator lengths needed for trombones to add to the 105 bass pipe section. Maybe Robbie can help, or possibly someone else may have info...

•This is a postscript to my posting about organ reed pipe voicing [121011 MMDigest, "Reeds for Trumpets"]. Dom Bedos [*] describes a test for determining if the resonator length is correct: Put your open hand over the top of the resonator as if to stop the pipe (while it is playing). It should fly o...

•David Dewey's comment (MMD 140222) about loss of downbearing affecting the tone in the bass end of the Mason & Hamlin made me reflect on the role of the "tension resonator" in Mason & Hamlin pianos. This device is meant to resist changes in the piano by pulling the sides in using rods that are simi...

•There is currently for sale on eBay what I believe to be a chest from an Aeolian Duo-Art Orchestrelle, containing two ranks of free-reeds with magnets and what looks like a wedge-shaped resonator [array]. If it is not from a Duo-Art Orchestrelle, I wonder if it might be a free-reed echo division fr...

Bob, I am copying this to the rolls list because there might be some more general interest or insights. Hope you don't mind. I saw your posting about German organs, and hope you might have collected some information about French organs as well. In your organ research, have you come across anything a...

In a message dated 95-12-05 00:59:52 EST, you write: > > In your organ research, have you come across anything about the Gavioli > "Harmoniflute"? I have an 8-tune 38 note barrel organ I purchased . > The most interesting part is the base (trombone) pipe, which is pear shaped > and contains the 3 lo...

In a message dated 95-12-06 00:19:01 EST, you write: > Some of the German organs featured a rank called a > "doppleflote" which means double flute. These were wooden with two pipes > built into one, arranged back to back. Normally these were tuned in unison > or sometimes slightly celeste and played...

I have been fascinated by the mysterious (to me) Deagan company but have never had the opportunity Gloria Schack enjoyed to hear an account of the company by one of its employees. We always seem to get interested in our history when it is too late. I once heard a Deagan uniphone in a Shriners' parad...

Scientists use these definitions of resonant systems:    Fundamental: the lowest natural resonant frequency    Overtones: the remaining frequencies above the fundamental    Harmonics: Overtones which are an integral multiple of the fundamental frequency (2,3,4, etc). I think in the piano trade "Part...