On the album, Johnson is joined by tubists Velvet Brown, Dave Bargeron, Earl McIntyre, Joseph Daley, and Bob Stewart, pianist Carlton Holmes, double bassist Melissa Slocum, and drummer Buddy Williams.

"[8] Jack Bowers of All About Jazz wrote: "While Gravity... may be too weighty for some, it clearly shows that the tuba, when placed in the proper hands, is a more versatile instrument than is often presumed, capable of much more than background oom-pahs and able, in this case, to carry an entire album on its ponderous back.

"[4] AAJ's Roger Farbey commented: "One important factor of this recording... is that despite the challenges posed by the sheer immensity of the instrument, the tuba is more than capable of successfully executing both lead and improvisational roles.

"[5] Writing for Jazz Weekly, George W. Harris praised the album's "amazingly rich and glorious harmonies," but noted that "when the times come for the tuba to solo, it tends to get a bit drowned out for the simple reason of its difficulty to be as dynamically expressive as a smaller brass horn or reed.

Far from being limited to providing the bass line in a brass band or portraying Tubby in an orchestra, the tuba becomes a vessel of expansive tonality, and, in genius/visionary Johnson's hands, a medium of masterful improvisation equal to any trumpet.