"Steve, even connecting to your Overdrive SE, the basic computer needs to be tweaked to get the best sound out of it, isn't it?"
The optimum sound, yes, however really good sound is possible without all of this. Both best of shows at RMAF I used a standard Mac Mini.
"Simply loading ripping software, playing software and connecting usb will not be enough. I doubt it. How about power supply? "
I still use the standard floor-wart on my Mac Mini and used this at the Newport Beach show. I'm planning to give a Hynes supply a try however.
"How about other programs that are running on that computer and may interfere with the sound?"
These do make a difference. It is fairly easy to follow instructions to eliminate these if you want to get the very best SQ.
Steve N.
Empirical Audio