MIDI Note Numbers?

Greetings. As you may know, different hardware and software specifies different relationships between MIDI notes and MIDI note numbers. So some software or hardware will specify note number 60 as C3 or C4.

I am trying to get the MIDI trigger out module to send note numbers in the 0-12 range for control functions, but I don’t know if C-1 is note number 0 or 13. I can hook it up to a MIDI monitor but I thought I’d ask here in case anyone knows.