Hmm, I found this info about the recorder:
http://www.minidisc.org/part_Sony_MZ-R30.htmlIt uses atrac 4, which, imho, didn't sound that great (kinda dry and lackluster sound). Battery life stinks with AA's.
I would personally avoid this recorder and look for something more recent. Look at it this way: try buying a recorder that allows you to digitally transfer your recordings over to your pc for editing and burning. Plus, I don't think older Sony's allowed you to change the recording volume once you began a recording. If your on a budget and can only afford a MD unit, look into Hi-MD units.