You have system configuration problems.
What you are describing would stop the entire music industry from functioning.
What you are describing would stop the entire music industry from functioning.
But it does become a real thing if you're sending a lot more than that around, like pitch, velocity etc.
It doesn't affect the music industry much because MIDI is overwhelmingly a software standard not a hardware standard these days, so the low baud rate doesn't apply.
Edit: Wait, no, 5ms which is heading towards noticability but not there yet.
The first byte tells you it is a note on or note off and the MIDI channel, the second byte tells you the pitch and the third byte tells you the velocity.