I have a stupid question. I'm busy with a project where I want to incorporate MIDI in and out.
I want to use the MIDILibrary form the playground (http://www.arduino.cc/playground/Main/MIDILibrary). I made a "shield" to do this using a 6n137 optocoupler for the input side.
Works great. But it gives me a signal that goes from Low to High. Thus:
Doesn't that need to go from High to Low? Like:
I have no experience with Midi, and I don't have any MIDI equipment to test. At the moment I have only one Arduino.
Do I need to invert the MIDI signal I got (picture 1)?
I search the webs but couldn't find a real answer. Hope the question is clear?