The great pianist Wray Downes (http://www.myspace.com/381846361/music/songs/For-You-3209961) uses the term "deep time" to describe the effect achieved by the very strongest players, rhythmically speaking. A musician who achieves it has a sound that seems to expand with every note played. It allows the listener to hear into the very structure of the instrument, right into the grain of the wood in the case of the guitar and upright bass. Two musicians who provide an excellent example of the phenomenon are Jim Hall and Ron Carter, who have made three albums as a duo: Alone Together (1972), Telephone (1985) and Live at the Village West (1995). The track linked below is one of my very favourite versions of "Autumn Leaves", from Alone Together. It's everything jazz should be, played with deep time: http://www.youtube.com/watch?v=wjfN5NKnJ90