Excuse my ignorance , but can someone explain the purpose of the "legato" instruments and their proper use with the performance tool, i.e. utilizing legato mode.

As I take it, in composition, legato is used to describe smooth passages w/o break. But what I don't get about the legato instruments is the slight pitch bend imbedded in each sample. What is that all about?? Should I be using the Peformance Tool is some manner to remedy this?

Thank you for your insight.