piggyback midi processing from oxygen 8

Testing/Troubleshooting
1

hi folks!

Best wishes to you all,

I wish to add further fonctionality to my m-audio oxygen8 by sticking a midibox on it’s output.

I have wired the core to the oxygen’s 7805 and both midi outputs (core and oxygen) work fine.

Now I want to wire the midi out of the oxygen to the midi IN of the core and have the core process the keyboard’s data (transpose, arp etc) but the core crashes and reboots when I plug one into the other. I guess there is some problem related to power or signals?

Must I be using or removing a resistor?

I m not that good at electronics, thanks for any help on the subject!!

2

  http://www.ucapps.de/midimerger.html

3

Thanks Cimo,

But wanted to save the space of an extra core, anyway PROBLEM SOLVED!!!

Dead optocoupler… I forgot to unplug the core whilst soldering to midi in pins GRRRR

Thanks, Photos on their way!!!

Alkex