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Old 9th August 2012, 08:22 AM   #11
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That is a possibility depending on what is wrong with them.
If you get one and the CPU is dead or something then your are back at square one.

You got me going now!!! He,he,he

I will do some searching and see what I can come up with.

When there is a will there is always a way !!!

jer

P.S. Check this out !!!

http://www.kinkennon.com/virtual_pip...pipe_organ.htm

a link from one of the pages,

http://www.schmalzhaus.com/UBW32/

I was going to suggest a PIC cpu of some sorts and this can be done very easily as they aren't too costly and are easy to use. Although I have not worked with one yet,I have seen them used for all sorts of stuff and I have been wanting to get one for some time now as some come with the BASIC programing system built into them!

All that is required to use and program them is a RS232 port or even a USB port!!!
This thing runs at 80Mhz !!!!
That is plenty fast enough and you should be able to implement velocity with no problem, and, aftertouch as well if your unit has the sensor for it.

https://www.sparkfun.com/products/9713?

I found the link in This thread,

Making a Midi keyboard

Last edited by geraldfryjr; 9th August 2012 at 08:45 AM.
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Old 9th August 2012, 08:50 AM   #12
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Here is another one already done !!

MIDI CPU DIY MIDI Controller / MIDI Encoder / MIDI Brain – Highly Liquid Store

Here is the Manual,

http://highlyliquid.com/support/docs...ware-Rev-K.pdf

Just Google "DIY midi keyboard" and you will find a ton of stuff !!!

One more,

http://picsynth.000space.com/midi.html

WoW, This one might be Perfect for your appilcation!!!


Cheers !!!

jer

Last edited by geraldfryjr; 9th August 2012 at 08:59 AM.
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Old 9th August 2012, 09:44 AM   #13
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Wow, you've really gone to work on my request haven't you? You don't know how much I appreciate this. I've been to some of the links you've mentioned and the Highly Liquid MIDI CPU was one of the ideas that I was sure would be what I needed. If I knew what ready made CPU I need to set it up for USB and any other component, I would start right away. My electronics skills have dissipate somewhat and I may have to relearn.

The last link about building a MIDI keyboard was one I visited from the beginning of my research and was a little over my head at the time so I didn't read it thoroughly, but over the last 2 days, I began to understand more and this second visit was a little more easier to comprehend (I might have a memory like a siv, but I learn very quickly... perhaps I already know a lot and just needed memory jogging). It's still a little over my head as far as the electronics go and I will need to do some reading for a few weeks, but at least if I knew what to buy and how to implement everything, I can start my project soon.

Thanks geraldfryjr, you are a gentleman and legend.
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Old 9th August 2012, 09:56 AM   #14
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EDIT: Just thought I would mention that my design of the wooden enclose will be expanded a little to the left to add a pitch and modulator wheel. The design is not finished yet because I've not accounted for the CPU and control sizes, but it's a start.
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Old 9th August 2012, 10:15 AM   #15
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No problem!!!
Thank you for the kind remarks.

From what I understand is that you hook them up to your computer via RS232/USB port and run a program that is a terminal emulator and program away.

The one is already done for you and all you have to do is hook it to your subject keyboard and use it.

The last one is even simpler yet with two chips and is more DIY and can be done on a breadboard.
But do use sockets for the chips.

I am not sure if he has the program published for self programming as I have not read the whole thing yet.
But $20 is reasonable to me and all you have to do is wire it up.
I read most of it and it is very simple and you just wire it like it is explained.

I think the Highly Liquid one would be a better choice as it has more features and is already done for you and all you have to do is hook it up and wire your keyboard switches to it with some ribbon cable.

Should you decide to follow through with this I can help you the best I can as this sort of stuff is old news for me and I do it all of the time. He,he,he,he




jer

P.S. The words "NO" and "CAN'T" are not in my vocabulary !!!

Last edited by geraldfryjr; 9th August 2012 at 10:20 AM.
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Old 9th August 2012, 12:25 PM   #16
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Fantastic! I may very well go for the HL board as it seems to have enough to support 61 keys and a few potentiometers. I'll let you know when I get it as I may require some mollycoddling with the wiring. Thanks again.
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Old 9th August 2012, 12:44 PM   #17
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Cool!!!
Let me know how it goes.
Their MIDI Decoder board look pretty neat as well!

Very Cool Stuff indeed!!

Meanwhile here is a link to a thread in their forum that maybe of interest to you where a user converted his old organ with their controller board,

Midi organ. - Highly Liquid Forum


jer
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Old 11th August 2012, 05:49 AM   #18
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Mr Kinkennon is a participant in organforum.com. His project doesn't pick up velocity, but for a selfprogramming $29 board is fairly amazing. For velocity he stated he in the past he has used midiboutique.com products. They have a two contact velocity encoding keyboard. Make sure you understand whether your keyboard is matrix switching, or parallel 61 form A contacts, or what? Before you invest any time.
And if your going to do a lot of work on your surplus keyboard, precious metal contacts have more of a future life than conductive rubber ones. Pity you don't live in this hemisphere, fine hardwood organ cases with up to 11 rhodium contacts per key are going to the dump all the time.
The best midi intro was written by picothinker on the organforum organ building forum, the midi section. Just you have to set the default to display more than one day to see anything, the moderator likes to keep all that hidden for some reason.
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Old 11th August 2012, 12:36 PM   #19
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Man I sure would like to get my hands on one of those old old keyboards with 11 switches per key !!!

Here is another very informative link,

DIY MIDI controllers using PIC microcontrollers and Basic Stamps | Ross Bencina

Enjoy !!

jer
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Old 11th August 2012, 01:49 PM   #20
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Most MIDI keyboards transmit and recieve MIDI data.

You can play the keys and the note, velocity, pitch bend, and other date will be sent through the MIDI cable (MIDI transmit) to another keyboard, sound module, or computer.

You can send data from a MIDI keyboard, or computer into a keyboard or sound module that receives that data, processes SOME or all of it and plays the sounds.

I bought a little microprocessor board about 10 years ago that goes inside an old Casio SK-1 sampling keyboard. It receives MIDI note information and plays the notes on the Casio. It does not respond to velocity, or other info since the Casio couldn't use it anyway.

There are several similar kits on the web. If analog synthesis is in your future, look at PAiA Corporation - Analog Synths, Theremins, Preamps, and More, these guys have been around for 40 years or so. I built one of their synthesizers in the early 70's. They have a MIDI to analog (control voltage and trigger) interface kit.

It sounds like you want a way to get music from a piano type keyboard into your computer. I looked at building one, but found it is far easier and cheaper to buy one. I got an M-audio Oxygen25. It has a 25 key music keyboard two wheels for pitch bend, 8 knobs, and a readout. These can be assigned to various functions in your DAW program. It can plug into the PC via USB so that no MIDI interface is needed in the PC. Building something with those capabilities would take time, and probably about $100, so I bought one.

I haven't used FL studio since it was called Fruit Loops, so I can't speak for the assignabilities, but In Sonar the knobs can operate nearly anything, and then can be reasigned to faders at mixdown time. There are dozens of these things out there with even more capability, but the O25 is under $100, and beyond my skill level. There is a really cool Roland / Cakewalk for about $300 with a larger keyboard, but I don't need (can't use) the extra capabilities since I too am a music tinkerer, not a pro.

You can also get an interface that mounts on a guitar and sends MIDI data. Good ones aren't cheap, but I got a used Roland on Ebay and it amuses me while annoying my neighbors!

M-Audio Oxygen 25 - USB MIDI Controller | Musician's Friend

Cakewalk A-300PRO USB/MIDI Keyboard Controller | Musician's Friend
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