yeah there is but it would be as easy as say using the time warp in ableton.... with logic you highlight an area(say 4 bars) and the audio clip youve slected will stretch itself to the length of 4 bars. ah ok. sorry dude, i just got logic and havnt really gone too far into it. just assumed it was easy coz the guy at the apple shop was telling me how much of a life saver it is