Were not talking totally out of timing but the human ear is sensitive downto 20 miliseconds. I talk about perofessional use, for selling music on CD's. Some will never hear it, but I feel it, and I know how to come around it. it's no problem, just buy two other synth and only use 4 or 5 channels from JV-2080. Be sure you have a quality MidiSoundcard on you'r PC otherwise that could lead to bad timing too.