DIYAPASON-L Digest #974 - Monday, March 15, 2004
 
Midi to Magnet Driver
  by "S. Durham" <sdurham11@comcast.net>
Re: [Residence Organs]  Midi to Magnet Driver
  by "Keith Zimmerman" <kwzimmerman@alltel.net>
 

(back) Subject: Midi to Magnet Driver From: "S. Durham" <sdurham11@comcast.net> Date: Mon, 15 Mar 2004 20:39:27 -0800   List:   I have a electro-mechanical relay on my pipe organ but I want to be able = to play MIDI files through the organ and wire a MIDI driver board of 61 = notes in parallel with one of the organs keyboards. I will manually = register the organ. What I'm looking at is a player pipe organ. Can = this be done? And if so, how? Any possible problems? I don't have the = money to convert my organ over to a solid state relay system right now.   Now the next big questions is: Where do I get such a MIDI Driver Board? = There is such a limited amount of information available on this = subject. I wish someone with the knowledge would develop a website or = book that would describe solid state relay and MIDI systems for dummies = like me. This stuff makes my eyes glaze over!   Steven    
(back) Subject: Re: [Residence Organs] Midi to Magnet Driver From: "Keith Zimmerman" <kwzimmerman@alltel.net> Date: Tue, 16 Mar 2004 00:10:16 -0500   Steven,   I have wanted the same thing. My organ came with the electromechanical = relays as well. I'll try to not say tooooo much since there are others = on this list who know much more than I about this. I'm making a couple = assumptions in what you're asking:   1. You want to be able to record your playing from the organ console = - called "sequencing". This is like making an electronic "piano roll" = for the music you played on the organ. 2. You probably would like to play MIDI sounds at the organ other = than just your organ pipes. 3. You'd like to download a MIDI file - or create one with a program = such as Cakewalk - and have your organ play it all by itself. 4. You probably don't want some kind of Rube Goldberg setup in order = to do this.   Most of the solid state relay systems are equipped to handle all this as = part of their "standard equipment". I have been considering using a = system by Opus-Two, which I have already had spec'd out for my organ. I = have also considered Syndyne. There are others out there. They will = cost a few thousand $$. I'm waiting to see what my cost is for the = cleaning and revoicing of my pipework before I get rid of my EM relays = completely.   In order to get the info into the MIDI device, you will have to connect = your keyboard to a MIDI circuit card. If my info is correct, most of = these cards operate at +/- 5v DC, whereas our EM relays and switching = circuits are powered by at least 12v. I think there are switching cards = out there that act as a "go between" between the key contacts and the = MIDI card.   The MIDI card will probably connect to a computer (laptop) so you will = have some way of saving the MIDI files you create as well as play ones = that you have obtained elsewhere.   In order to get the organ to play itself, though, I think you will have = to get the info back to your EM relay panels. There are cards that do = this. They convert the MIDI info into info that is then interpreted by = Magnet Driver cards. These cards would have to be re-introduced back = into your key switching circuit somewhere. The magnet drivers are the = electronic contacts that would connect to your EM relays.   I have entertained the possiblity of keeping my relay panels. In that = case, I would use the solid state switching in the console - IOW, gut = the console and replace it with solid state components. The magnet = drivers would then go to my relay panels. In specing out my organ for = Opus-Two system, this would not save enough money to make it worth = rewiring my old relay panels.   To add a little more excitement or versatility, I wanted to be able to = have each rank of my organ (unit ranks as opposed to the straight ones = on my pitman chests) to be "individually" addressable. This way I could = have each rank even represent a separate "instrument". In a typical = "player" organ of 2 manuals and pedal, you have only three separate = voices. If each rank was individually addressable, then each would have = its own MIDI address and an 8 rank organ could be made to play an = "octet" transcription.   IOW, I would recommend that you look at saving up to scrap your EM relay = system and going solid state. Then you can even change the assignment = of ranks (IOW change which are on Swell and which are on Great) on the = organ from a computer. The basic MIDI stuff will probably be standard = equipment. In order to play MIDI sounds, you'd have to add a MIDI sound = box/card and a stereo. For some of these, the combination action is = standard as well.   I would be happy to continue to speak in my ignorance if you'd like. = Hopefully, I've made some sense herein.   Sincerely, Keith Zimmerman Commerce, Georgia     ----- Original Message -----=20 From: S. Durham=20 To: Residence Organ List=20 Sent: Monday, March 15, 2004 11:39 PM Subject: [Residence Organs] Midi to Magnet Driver     List:   I have a electro-mechanical relay on my pipe organ but I want to be = able to play MIDI files through the organ and wire a MIDI driver board = of 61 notes in parallel with one of the organs keyboards. I will = manually register the organ. What I'm looking at is a player pipe = organ. Can this be done? And if so, how? Any possible problems? I = don't have the money to convert my organ over to a solid state relay = system right now.   Now the next big questions is: Where do I get such a MIDI Driver = Board? There is such a limited amount of information available on this = subject. I wish someone with the knowledge would develop a website or = book that would describe solid state relay and MIDI systems for dummies = like me. This stuff makes my eyes glaze over!   Steven