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…

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