There is often reference to jitter and having as low a jitter as possible. If there is a MacBookPro which appears to be model 8.2 (late 2011) and it were relegated to music server duties, what preparations are best done to suit this purpose? Is there any specific "jitter treatment" if it were required, and how can I find out about its jitter level? Also there is mention on this forum about the BitPerfect from the Apple App store, it shows up as being an audiophile grade music player costing 6.99. Would this be a worthwhile download if used for creating a CD rip library, or is it not really worth it? Is there anything else that could be done to optimise a MacBook to be used as a music server? I have BitPerfect on my MacBookPro, I think its main purpose is to output bit perfect files and automatically select the files' format and bit rate, which iTunes does not. Anyway, it only does this for the digital output, so when your MacBook is used with an external DAC. For ripping duties, many say that XLD is a very good integration to iTunes, apparently ripping more accurately; this has not been proven so far yet, but it's true that XLD is a small, well functioning ripping software. For playback duties, a software called Playback, by Yazsoft, enables easily and effectively your MacBook for UPnP operation (which the Mac is reluctant to do by itself); and there are many who