Oh, and perhaps most important of all: Keltner favours metal-shelled snare drums (particularly brass), Tutt wood. Brass is brighter and wetter (more high-frequency ring), wood darker and drier (less ring). Of course, that is effected by the tensioning/tuning of the batter and resonant heads, the tensioning of the snare wires, and the amount of damping applied to the top/batter head, via absorptive pads (as Ringo preferred) or Moon Gel. John Bonham played his Ludwigs wide open (no damping), except for his bass (kick) drum.
To hear the difference between metal and wood-shelled snare drums, compare the snare sound on "The Night They Drove Ol' Dixie Down" to the other tracks on The Band's brown album. To play the press roll on the former, Levon required the sensitivity and "wetness" of his old metal-shell Ludwig Supraphonic (those made prior to 1963 brass, '63 and later aluminum alloy). The wood-shell snare drum that was part of his stage set was too dry/dead to make for a good pr. That drum originally came with gut snare wires (as opposed to more modern metal), which, considering it's sound, it may have still been fitted with. VERY dry.
