I'm using a M-Audio Delta 44 torecord my beats from my MPC 2500 into Nuendo 3. The problem is that I get these pop and click noises, even when the buffer size is set to the max. Could this have something to do with not having enough RAM? As of now I am running a Pentium 4 1.6 GHz with 768 MB of RAM. When recording, my CPU usage can get up to 21%. Does that seem high? Would getting some more RAM solve this?