Oscar Moore occupies the historic and sonic middle ground between
swing guitarists such as George Van Eps, Allan Reuss and Freddie Green
and guys like Barney Kessel and Tal Farlow. Both Kessel and Kenny
Burrell regarded Moore as the "missing link". The earlier generation
of swing players tended to divide their playing between four-to-the-
bar comping, primarily on the 6-4-3-2 string set, and chord solos
(check out Reuss's "Pickin' for Patsy") where single lines are
reinforced by chord fragments around the first three strings. Moore's
contribution was to mix all that up in a more fluid manner, breaking
up the rhythm and throwing in unison lines and commentaries around Nat
King Cole's vocals and piano breaks. Moore often comped on the middle
strings (5-4-3-2) and utilized many more harmonic extensions, e.g.
9ths and 13ths in his group playing than his predecessors.
Most of the surviving footage of Oscar with Cole can be found in this
link from 41'00":
http://tinyurl.com/7kex6jq
The majority of Cole's soundies were recorded with Irving Ashby, yet
another unsung great who replaced Moore around 1947. As for books
about Moore's style, there's next to nothing. The only one I know
about but don't own myself is a folio of OM solos from the 40s. Anyone
come across this before?:
http://tinyurl.com/7mb28bv