666af52e_Midignusbuino___SGMK_SSAM_WIKI__Description
[Constant] MIDI_NOTEOFF [Data] pitch, velocity [Description] 
Note Off - a key has been released. Please note that many MIDI implementations actually send a Note On message with a velocity of 0 instead of Note off
Midignusbuino - SGMK-SSAM-WIKI
Description