Hi I have made an Arduino Midi musical instrument, using both a Hardware and a Software- serial output to play two Wav samples boards. This was done so that I can send different pitch bend commands for each boards.
I have also incorporated a USB midi socket out, from the arduino`s hardware-serial tx, (using usb Midi moco). This I use with midi editing software. Unfortunately this arrangement only gives me one set of midi notes.
My question is would it be possible to safely connect both the hardware and software-serial outputs together at the output socket, (perhaps using diodes, Op-amp, or opto-isolator) without the signals conflicting with each other?