zzz00m wrote:What is release velocity?
The answer is in the link you posted:
This term refers to the speed at which a key is raised (released) after being struck, as well as the type of MIDI data used to encode that speed. While most modern keyboards have velocity sensitivity, which is triggered when a note is depressed, release velocity sensing is relatively uncommon. The feature is typically used to control the rate of the release segment of a specific sound’s envelope.