I had a discussion with some "know-it-all" types some time ago. They suggested that there is no way to distinguish between midi bass and that played on a bass guitar. Mind you, I'm no expert by any means, but I told them (very politely) that they were full of it. So, I thought I'd conduct an experiment. I posted a midi version of "Donna Lee" which I downloaded from the net on a few forums, as well as here at Talkbass. What I found is that most non-bassists can't tell the difference. Bassists on the other hand, are a suspicious breed. I was found out on 2 other forums, and most recently, here in the Recordings forum by Wrong Robot who accurately implies that the mp3 which I posted in his "Donna Lee" post is a fake. The question I have is, if it's only us bassists that can tell the difference, are we expendable? Does anyone else care that the bassline may not have originated from a stringed instrument?