3 ms·

Isn't it roughly the same, if the IO you're speaking to is pulled down through a resistor to the ground?

• cma 3y ago
  Doesn't MIDI require optical isolators and the only part connected to ground is the cable shielding?
  • detaro 3y ago
    "require". But even if you add them (you should!), it's not like driving it gets any more complicated on the controller/software side, which is what notmypenguin was talking about I think
  • henearkr 3y ago
    And if they are pulled down to a low reference voltage independent from the ground? (thx, I didn't knwow about required independence from the ground)
    • colanderman 3y ago
      The input to an optoisolator (i.e., an LED) is two pins, with no reference to ground. So either current is flowing through the opto's input, or not. Because they're not referenced to ground (or any voltage), the voltage on either pin relative to ground is irrelevant. (In this way, two connected MIDI devices can have different ideas of what signal ground is without causing issues.)