hmm dont bother with wma.. it sounds very very tinny and lossy with anything below 128, which you can still here the artifacts at 128 anyway. LP2 sounds much better than any 128k mp3 and is comparable to a 192, and LP4 shows a definate difference from the original, although while you're out and about with your md sometimes it doesn't make a difference too much. But I'll say that stereo imaging is cut down a bt, thanx to joint stereo....
It really depends on how hard the incoming signal is to compress with the amount of bandwidth, the harder it is the more artifacts you'll find. Though I cant really tell you what sort is harder and what's easier to compress, just fiddle around I suppose. :roll: