also, it maybe noteworthy that for a MD recorder, you can record in what's called (i believe) LP2 mode - which will produce a mono recording (and give twice the recording length on a disc, if i remember correctly), regardless of whether or not stereo mic(s) were used. plus, since it's a MD source, chances are that it underwent an analog transfer from MD > CDR... the source info given doesn't specify equipment used, but it's quite possible a cheapo soundcard going Mic or Line In was used.