KEITH MCMILLEN SOFTSTEP Put your best foot forward FOR: Control freaks. The Keith McMillen SoftStep is one of the most intriguing devices we’ve come across in a long time. Simply calling it a USB controller doesn’t suffice—McMillen has dubbed the SoftStep a mouse for your feet, and we’re inclined to agree. The idea of being able to arm tracks and control the transport in Pro Tools with your hands otherwise occupied is appealing enough, but...