Hi. I am also getting buzzing during playback.
The problem is definitely related to high CPU load. That said, I can play a BluRay or do almost anything else without having audio artifacts, so it would seem that this is something that could be fixed. My system is an Intel i7, 8 cores, 16G running Win8/64. I am often running large background applications, and when the CPU is loaded, even moving the mouse between windows will cause my audio to be interrupted with a loud BZZZ. Quite annoying, especially once or twice per song.
While I am not a JR MediaCenter expert, I have run several tests and not found a solution, other than only using MC on a quiescent system. I had thought the problem was from spooling my audio files from my network, though the library was local. But I moved some of the audio files to my local disk, and the problem remains. I tried setting "play files from memory", "prebuffering" to 10 seconds, device settings\buffering to 1 second. I tried setting Windows advanced settings, performance to give preference to background (also foreground) services. None of these made an appreciable difference. The problem has persisted since MC 19, but I hadn't really given much attention to investigating the problem until now.
Any suggestions for settings I haven't mentioned?
Thanks
David