Thanks, MAtt! I copied all my files to the server from an external USB HDD (my local drive). Those files play just fine without any problems. I did try Output changes as you suggesssted, but to no avail. Since, both the external USB HDD, and the NAS server, work fine on MC 11, I thought maybe it might a problem native to MC 12. I I am using the Asus A8N-SLI motherboard with the Realtek ALC8S0 8-channel audio CODEC. I don't think this would cause the delay, but I will go to the Asus website and see what I can find.