It is a controller for a pc based dj system.
I used pcdj and someone asked if it you could use a joystick to dj with , well I had a gravis gampad hanging around so I gave it a whirl and it worked

It then got me to thinking.... I could make a homemade controller using an ultimac minipac and a buch of buttons that I am currently not using .
Thanks
Ed
BTW ...If this works I will probably see if I can find some other types of buttons ...other than the typical round ones...Any ideas where to buy these inexpensively ...other than happs