Here’s a small concept that might drive DJs or VJs — performance artists of that kind — a little crazy: *Visual Scratch* (not the tame kind; let me get a little wild here ^^'). Visual Scratch is a small device created by Jesse Kriss, primarily using Max/MSP (referred to as "mm" after), with real-time visual feedback as its foundation. This tool enhances the stage performance effects for DJs. In the implementation process of this device, besides Max/MSP, the software...