Even though Yamaha says they are stereo samples they aren't from what I found doing edits. If you look at the sound itself in the edit controls you'll notice even the LIVE Grand is just a doubled mono sound panned hard left and right. Yamaha adds a bit of reverb which is in stereo to simulate true stereo. In my opinion it just doesn't sound right. I suspect they don't use true stereo samples because they are memory hogs and ROM doesn't go far using stereo sounds.