Adoba Audition CS6 Punch and Roll

No, it wasn't introduced until well after CS6. Travis Baldree wrote an extension for CC2017, but I have no information about whether it would work on any version prior to that - you'd have to ask him. That extension is available free on the Adobe Exchange - Audition punch and roll - but like I said it was written for a version later than CS6. Travis has a webpage here.