Eperience + Effort + input = time.
It's different for everyone. I've had the game for 6 months and am barely competent. Others come from a coding background and are basically wizards.
The splitter. As far as I understand one metal band is power/neutral?, one is left ear and one is right ear. If you have the mythical fourth band that's the mic.
Idk if this is right at all, but you would have to set variables that correlate to that the #a is doing. So b=1 would be beep 1, b=2 would be beep 2 and then you use something like if #right then b=1+1
And your b variable would be doing something else. If b==1 then beep1 etc etc.
And I believe 12me21 is showing you a screenshot of sbschatsim