DIYAPASON-L Digest #125 - Thursday, July 20, 2000
 
Pedal reed
  by "Pieter Smit" <pieter@cadence-engineering.co.za>
Re: [Residence Organs]  motor starter
  by "Bernard C. Nordmann" <bcnordmann@cdmnet.com>
Re: [Residence Organs]  Pedal reed
  by "Ron Rarick" <rrarick@gw.bsu.edu>
 

(back) Subject: Pedal reed From: "Pieter Smit" <pieter@cadence-engineering.co.za> Date: Thu, 20 Jul 2000 12:09:22 +0200   Hi list members,   I know that choosing reeds on an organ is dependent on the disposition and style, but assume that my house organ leans towards the classical and baroque style. (I already have a rohrschalmey 8' on one division.)   The problem I am faced with at the moment is in choosing a pedal 8' reed. One classical solution is a baroque trumpet with a strong fundamental but without too much clang. On hearing Paul Fritts present his lecture on = reed making (I have a video of it), such a trumpet is what it should be - low pressure, wide tongues. I am thinking of making the resonators out of wood - I guess that this should mellow the sound somewhat - a very bright trumpet might be out of place in a residence organ in a small room. What = I am not sure about, is that a trumpet is normally made softer by narrowing the shallot opening - if a wide tonge is needed as proposed by Paul = Fritts, would it not increase the loudness too much - I guess that the shallot opening should be larger for a wide tongue.   As a trumpet is of full length (around 2.2 m) other shorter reeds might be considered. Here I also have a problem: I practised many years ago on = a church organ that had only a Subbass 16', Oboe 8' and Principal 4' on the pedal (the latter two a transmission from the swell). The Oboe was un-usable as its 5th harmonic (tierce) was very strong and clashed with = the equal temperament thirds. The great trumpet on the same organ coupled = well to the pedal. I assume that a partly covered stop would enhance the odd harmonics and give rise to this phenomenon.   This is then where my problem lies: Choosing a smaller length reed with = a Clarinet type contruction like Krummhorn or Dulcian might present strong = odd harmonics (especially tierces) just like the Oboe . Has anybody experienced this in the past or would like to comment on suitable pedal reeds at 8' pitch? I guess that regals and other baroque reeds could also be looked at (what about trichterregal or scalmey - half length - but that would then compromise the strong fundamental as proposed by Paul Fritts. Could the fundamental be enforced by the 8' stopped flute?)   Any ideas?   Pieter Smit pieter@cadence-engineering.co.za    
(back) Subject: Re: [Residence Organs] motor starter From: "Bernard C. Nordmann" <bcnordmann@cdmnet.com> Date: Thu, 20 Jul 2000 10:48:07 -0500   At 11:34 AM 7/18/00 -0400, Roc wrote: >who likes repulsion-start motors UNTIL he has to get inside to play with >necklaces and brushes,,,then he wants polyphase, lol.   One of these days I'm going to make some new necklace elements to fit the = 2 HP and 3 HP Century R.I. motors unless, that is, you (Roc or anyone else) have a source for these*. I gave up about a year ago.   *The successor to Century Electric, Gould National, doesn't have any, so don't bother talking to them.   Hello to all,    
(back) Subject: Re: [Residence Organs] Pedal reed From: "Ron Rarick" <rrarick@gw.bsu.edu> Date: Thu, 20 Jul 2000 11:28:51 -0500   Pieter and all, since there is already a Rohrschalmei on the instrument I would prefer to go with the full- length 8' trumpet, perhaps in the form of a Holzposaune (wood trombone) as you suggested you are willing to try. If headroom is a problem you can always miter a few bass notes, but if the resonators are wood I should think you would have to miter bourdon-style rather than knuckled near the block as is typically done with metal resonators. I don't have the kind of expertise on shallots that would help you make your decisions about loudness vs. tone color; I would be interested in others' thoughts or experience with that.   Ron Rarick Muncie, Indiana