Donny... it's not exactly a fully produced production! Two guitarists (both acoustic, but one used an effect for the solo in Blue Sky) and a drummer. Doesn't get more basic than that.

If I want to entertain (my audience or myself!) totally by myself, no machines, no nothing... I'd rather just sit down at the piano. Once you add any machine, even just drums, and you start doing the LH bass thing, I find I like to have a guitar in there too. What better than the real thing!