I don't know why he suggested that. Really don't. Been reading up on it. All I'm trying to do is now add an LED for each track so when the current track is playing it will light up green and when it's recording it'll light up red. He said "you need to physically get midi from the midi out of the interface into the arduino. For this you need an isolated circuit which is achieved using an opto isolator." I need to write this into the program but then I also need to write a script for a pluggin called mobius to assign it to each track switch/foot pedal
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