Wow Tom Rice,I bought your Logic's Latency Toolbox and it's worth every penny ! I did learn things I didn't know I missed :-) I have a question...Using Tom's I/O PING test and physically patching OUT1 to IN1 I get a latency offset of +104 samples! I record at 44,1 khz.I use Logic,a MacPro 8core,a Motu PCI 424 card and a Motu HD192 12 I/O... I tested different buffer sizes but the result is always +104 samples... I see on the forums that the average ranges between 5samples to 58 samples.. What could be the problem? Ps: I also use a big hardware mixer (48channels-8subgroups),could you please make a tutorial on using Logic with a mixing-desk and how this effects latency and recording delays? I would instantly buy this :-) Thanks again Tom for your fantastic Latency Toolbox!