via
Beat707 where you'll find pre-order links:
"Presenting two great projects that I'm currently working on. I don't have pictures or videos yet as I'm still doing the prototypes. But please, read the complete description and PreOrder when possible to help me out getting the PCBs done as soon as possible. All projects will be Open-Source and Arduino Compatible.
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Beat707 MKeyS
MIDI Key Switching
A Small unit that allows you to select a Key and only when that key is pressed all other keys will be sent to that unit. So you can have multiple units, each to a MIDI Destination Device, and from your Master MIDI Keyboard, use the bottom octave keys to select the target destination.
To select the options you have a simple system on the board. A button and a LED allows you to set the key-range for the keys selection. And the Unit's key number.
Hardware: a very small board with MIDI Input (female) and Output (male) small cables, powered from MIDI (no external power required, but a header for that is added in case you have problems with that). We use the ATtiny85 IC (8 pins DIP) since it is low power. The MIDI cables are soldered directly to the board. Making this a pass cable that you just put between your units.
Usage: to setup the unit you just press the button and wait for the LED to flash. Now you can select which octave you will use. Quick press selects, long press goes to the next option. Now you set how many keys you want to use. The next option is the current Unit key number. Next the LED flashes again and the information is saved. Holding the button just shows the information in the same order, with flashes between each option.
What it can do: let's say you have 4 MIDI Sound Modules. For each you add this in the MIDI cable that goes from the Master Keyboard to each unit. Usually you have a cable from the Master Keyboard to the 1s Sound Module, and from that, using the MIDI Thru, you conect to the second module and so on. Now, on all units set octave to 3 and number of keys to 4. And on unit 1 you set key to 0, and unit 2 to 1, and so on. Now on your master keyboard you can press those keys on the bottom octave and them MIDI data will only be sent to the key selected unit, and output to the Sound Module connected there.
Some ideas took from the module below: key press or while key holding (possibly more options).
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Beat707 MPBox
MIDI Processing Box
A small module that allows you to process MIDI data in several ways. A couple of buttons and LEDs allows you to select the mode and options. The software, them, does the rest.
The hardware is simple but effective: MIDI Input and Output Connectors (female), ATmega328, USB 5V+ Power Input, 2 buttons and 2 LEDs.
Possible Modes:
1) Key to Channel Switching. Just like the above unit, but here we just change the MIDI Channel number for a key press. This is great for keyboards that has weird ways of changing the channel number. Resuming: you press the lowest key on the bottom octave of your Master Keyboard and that selects MIDI Channel 1. The next key would be Channel 2, and so on. With options as on press or while holding (possibly more options).
2) ARP, with several pre-programed options.
3) Chords. The hability to create instant chords from single key presses.
4) Mellody. You hold several keys at the bottom octave, and the upper zone white-keys will follow those keys.
5) Key Latch. Does just that. With the option of a bottom key to release it all, or low-velocity press.
6) Key Transpose and Octave Transpose using the bottom octave keys. But fixed values can be setup too.
Just give me some more ideas and I will do the code. ;-)
The software can hold multiple modes, as there's no lag on adding that. And the board can be very small to really set a mode once and forget about it. We will supply detailed information on how to set modes and options. The interface is simple so this is not an unit that you will be messing around live.
BUT, here's an idea for LIVE usage. Setup different modes to different MIDI Channels. EG: CH 1 uses the ARP, CH 2 uses Chords, CH 3 uses Key Transpose."
