Issue with record playback

So I’m using a mpc to my computer without an interface. Ya I know. I used before and it worked like a charm but when I record drum now they sound as if there sped up or have quantized on and it’s not my mpc and ya I know there’s no quantized in audacity. I don’t remember touching anything in audacity from that one day it worked to now. Of you can help. Thanks and cheers

So you’re doing this…

http://www.kozco.com/pictures/boothFinished/mixer.jpg

The sound equipment (the mixer in front) is plugged into the Mac Line-In. Right?

Koz