Ondřej Kabrna Klavírista EN CZ

Organ Footpedals and MIDI

17. May 2019
MIDI organ for Home

I tried hammond XK system and also KeyB Duo (I like it much better), so I built this organ MIDI pedal for both:

And another pedal: this is small, tramway version:

And one more, I have it for MIDI now, probably the best, light, yet exact copy of dimensions, etc., like hammond. MIDI is the tiny, made by Mr. Roman Sowa, Poland, take about 1mA / 5V power supply, that's what I built into the MIDI connector :-))

And this I built "for home". Goes through the GrandOrgue application, which is free, I have downloaded Burea samples (three-manual instrument, 65 registers), also free. It plays beautifully! For this purpose, I converted the original MIDI two-manual (it went through the Ahlborn MIDI module) into a three-manual, where the top is easily removable.

How does it work? Of course, you can buy three MIDI manuals, but it is 1000Euro or more... So I built this: the manuals you see are: bottom: Yamaha PRS38 (year 1989 :-)), middle: noname MIDI master keyboard (second hand), top: M-Audio Radium 61. All keyboards and necessary intestines, to make it work. The top manual is connected via connectors and can be easily removed, as I also use it to write notes on a computer. He was wearing 16 programmable controllers: I disconnected them and grounded the inputs, but three go through the connector: these are the three pedals (controllers, also crescendo)... Everything allows you to control via MIDI, either classic or USB, so the bottom is MIDI channel 1 (the old Yamaha did not know otherwise), the second and third manuals go via USB, the channel will find it itself. I once bought a pedal (AGO standard) and made a MIDI (Berio module) into it, it has a channel 4 output, as usual. But there is actually another manual that is not visible: the old Fatar Studiologic 49, of which it is only a motherboard and instead of the keyboard there are only contacts: and these are all the pistons and presets (microswitches plus diodes :-)) It all goes on the channel 9.

The whole works very nicely, but it's quite difficult to comp. When played through many registers and clutches, the computer already tends to chop. It would take a more bloated machine. But for practising more than great. Here are some photos "inside".

And to control: a touch monitor would be ideal, but they are expensive. The tablet you see is from second hand, it would go via wifi, but it's much better straight through USB. :-)



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