HI I AM NEW NEW TO THE ARDUINO WORLD I AM PLANING TO MAKE A HUGE MIDI CONTROLLER WITH 64 POTS AND ABOUT 100 ARCADE BUTTONS BUT I REALY DONT UNDERSTAND HOW TO PROGRAM THIS AND WRITE THE CODE
CAN ANY ONE HELP ME WITH THIS PLZ
Shouting at us is not a way to ask for help, please don't use all capitals.
Sounds like you are just starting out with electronics and programming.
Why are you starting out with such a complex project?
The first place to start is to master all the examples that come with the Arduino IDE.
Look for some tutorials on the Internet, Adafruit and Sparkfun have some good ones.
Look at Robin2s how to do multiple things:
http://forum.arduino.cc/index.php?topic=223286.0
Learn by doing.
Also master Mr. Gammon's examples on his web site:
Once you get a grounding in the basics, progress to more advanced topics.
hi sorry for the shift i forgot it on
i am a dj/producer and i am exited about what i can do with such controller
i can use the livid instruments brain v2 for this it got 64 analog and 128 digital inputs
but its kind of expensive
tnks for answering 
brain v2 is perfect, let me know if you need help, I designed it 
wimwassim:
i am a dj/producer and i am exited about what i can do with such controller
i can use the livid instruments brain v2 for this it got 64 analog and 128 digital inputs
Maybe this will help?
http://www.pjrc.com/teensy/td_midi.html
Scroll down to "Connecting Many Buttons & Knobs/Sliders".
Notice the info near the end about delays and issues with extra capacitance. Many sites and tutorials will tell you to add a capacitor to improve analog input. Without an analog mux, that's great advice. But with the mux, you should avoid adding that capacitor at the analog input, or if you do, follow the advise in that forum thread about keeping the capacitor small and adding extra delay to allow for it to settle properly.