Arduino midi controllers codes

How can i find a 49key midi controller's code s i can download it ???

(deleted)

andreascyprus:
How can i find a 49key midi controller's code s i can download it ???

If you're talking about a keyboard (like piano/synth) then first, do you already have the keyboard and all the switches it needs? You have to start from there because there are many different ways the key switching can be arranged.

Does it need key velocity? Aftertouch? Octave switching? Pitch bend and mod wheel? Any other controls?

You need a much more detailed specification.

Steve