cd-r's only DAO only Do not write on discs Sound Quality Ratings: A+ = Perfect to near perfect quality; official release quality A = Overall quality very good; any imperfections are slight or transient in nature A- = Good recording with minor flaws (ie. heavy, muddy bass; treble roll-off; or excessive crowd noise) B = Enjoyable recording, but an obvious bootleg (analog quality)?C = Slight distortion?