Isolate FFMPEG on a dedicated CPU

[simoncn]

From a quick look at the taskset commend, you can use it to change the affinity of a running process, so you could try changing the affinity of the ffmpeg process while it is transcoding a song to see if you can hear any difference between running FFmpeg on the same CPU as MinimServer and running FFmpeg on a different CPU. If the song is quite long, you can switch back and forth to confirm your impressions. I think this should be the first step before trying anything else.

I think it is possible that processor affinity might make a difference to sound quality and I think it is useful for you to try these experiments.