WHAT IS MIDI?
Velocity - How hard or soft, loud or quiet you hit a note.
MIDI (Musical Instrument Digital Interface) is a way of recording and playing back music on keyboards or sound modules or computer sound cards.
If you record your performance on a MIDI keyboard then information about your performance is transmitted from the keyboard, along a MIDI cable, usually to a computer with a recording software programme (such as Cubase or Logic). The computer records the information so that you can play it back and listen to it. If you are using the same keyboard for playback then the same information is sent OUT of the computer, along another MIDI cable, and IN to the keyboard. If you want, you can send the information to play other keyboards or sound modules.
The four main types of information recorded are:
Actual note played - the pitch and position on the keyboard eg C3, E3, G3
When note is played - the exact time when you strike the note
Note Length - the duration or length of note (till you lift your fingers off the keys)
These are the main areas of a performance