After working with Real Tracks for the past few weeks, I'd have to agree with Graham about the acoustic bass being too 'busy'...my needs were for a basic jazz quartet, with me on live piano, and the BIAB RT on bass, drums, and guitar.... I'm using the MegaPAK, so maybe my RT options are limited, but ALL of the RTs for these instruments, in my opinion, way overplay their parts... to my ears, it sounds like they are all soloing at the same time - making for a very incoherent mix - so much so that my wife, the vocalist, struggles to hear the '1' and even what key they are in... Even the 'very simple' acoustic bass RT is WAY too busy... are there no 'basic' RTs to be found?