editing start and endpoints/ recording analog or digital

alright im practicing chopping samples. Im using OS. 3.0. can anyone offer any tips on editing your start and endpoints perfectly? i want to playback the sample without pauses.

and another thing which is the best way to sample without alot of noise analog or digital? cause i record off the computer using analog option and sometimes i get some extra noise.

and when you sample using vinyl are you going to have to by a interface?

With os 4 you can use the up and down arrows to zoom in vertically, dont know if this feature was in 3.06 already.

Digital would be better because no da/ad conversion needed.

You can sample directly into your mpc with any line source, but you cant plaug the turntable onto your mpc, you need a preamp like in the tt inputs of a dj mixer.