jo.PitchShift is a pitch shifter, which is based on the Max internal gizmo object. You can change the pitch of any audio signal within a range of four octaves in either mono (less CPU) or stereo.
The FFT values are also freely adjustable between 32 and 4096. It's a simple effect, but which can be used effectively both in the studio and during live performances and DJ sets.
This way for heaps more Max for Live devices & tips.