Last year Casio released their game changing XWJ1 DJ Controller. The XW-J1 allows you to conduct professional-level DJ performances with the iPhone, iPad or Mac PC that you already own. The versatile XW-J1 is compatible with Windows devices, too! For those who have purchased a XW-J1, Casio has just presented us with this informative video on how to calibrate the scratch platter of your unit.
Also check out this video of the XW-J1 which Casio posted pre-release to outline the features of the unit