Arduino powered midi controller for dj

Hi, I'm an arduino programmer since 2 years ago. I've already done only small projects, but now..i need your help.. :cold_sweat: I need to build a midi dj controller , i've been looked for online support, and I've done a small controller with buttons and faders(linear potenziometers) only. Now I want to improve it with 2 jogwheel for controll emulated cd reader(with software like virtual dj or mixxx or traktor). I know that i can do it with rotatory encoder, but ..what type of note i need to send when i move the joogweel? can you help me? thanks a lot! :sweat_smile: