Today, Tomorrow & Forever

This four-CD boxed set, which marks the 25th anniversary of the Great One’s death, is a sometimes fascinating and sometimes superfluous survey. There are 100 tracks, many simply alternate takes that are virtually indistinguishable from the final versions. But others — a clutch of live performances from 1956 and 1970, outtakes from his ’68 Comeback Special — reveal the canny instincts and raw firepower of a truly great vocalist.