Ehm, maybe a bit of a silly question, but as I’m planning to build a fully functional MB64 -for kicks and practical use- the function of the 64 LED’s is still a bit unclear to me. What do they do or better, where do I use them for?
They are cool ;D
Christoffer
Ok, you got me there… 
Ofcourse, LED’s are always cool! But seriously, what do they do, besides looking cool?
The purpose of the LEDs:
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if the appr. push-button is in toggle mode, the LED shows if the button is active or not
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the LEDs can also be controlled via MIDI. If your MIDI software supports some kind of feedback, you can use the LEDs to display the status of something (the MIDI event which controls the LED is the same like the event assigned to the appr. button)
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the MB64SEQ uses the LEDs to display the sequencer position
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the LEDs can also be misapplied as christmas illumination, you need:
- a core module running with any MIDIbox firmware
- a DOUT module
- the appr. number of LEDs (different colours increase the effect)
- some christmas songs in MIDI file format
- a computer with MIDI player software
- a christmas tree
hang the LEDs over the christmas tree, plug the MIDI OUT cable of your PC into the MIDI IN jack of the core module, assign the LEDs to some notes of different MIDI channels, start the MIDI file player and enjoy the show 
Best Regards, Thorsten.
Thanks again T. Although I’m not really a Christmas man, I can always build a mini-disco for inspirational reasons ;D
BTW, I’m a senior member now! 8)
The purpose of the LEDs:
- if the appr. push-button is in toggle mode, the LED shows if the button is active or not
Does this mean that every button on DIN corresponds to every LED on DOUT module? Can I make a DOUT module and attach only, for example, 12 LEDs?
Yes. Or even more than buttons.
You can use LEDs without corresponding buttons to show incoming midi-events.
My My…just laughed my belly sore you mad beggers.
Christmas tree synced lights…beautiful.a must !!!
Ian ;D
Oooh look I’m an old man too now :P!!!