I'm getting sme problems with my core 1) The PIC is alive, sends the upload request every 2 sec 2) The LED on the input port flickers on MIDI IN events 3) the MIDI DEBUG test1 - LED is lit but does not flicker on SysEx events sent to the core 4) the loopback test - events are coming IN (checked with a led), but not coming out I noticed with my multimeter, that a MIDI event causes the meter to beep (diode test) on an event i checked the path and up until the optocoupler it's the same beep, but after the optocoupler and on the PIC it's silent, i dunno if this test should pass the MIDI events unaltered, or do they change in some way? i didn't do the standalone optocoupler test cause i don't really understand it any help welocmed, thanks.