Crackle Noise with delay

Yo everyone,
I recently got myself a MPC Ren.
Now everything is going well except the most important thing : chopping vinyl samples up.
Everytime I chopped the sample in Slices and want to play it on the pads there is one strange and really loud crackle noise in the moment when I hit the Pad and the same crackle noise a bit delayed (even when its only a really short sample, so even when the sample is not playing anymore).

Since the Ren has a Interface built in I just connected a Technics Turntable to my Ren and the Ren via Usb to my Laptop and via Line Out into my Mackie Mixer.

Anyone knows whats up there ?
Thanks already guys

id say zoom in real close to the end of your sample. and make sure the wave is cut at the middle line cutting threw screen. thats your zero. start there. your chops are not perfect yet