"Get On Down!" in this case simply stands for some real driving Funk that I don‘t wanna miss and that I‘m sharing now. Again classics and rarities were combined here.
Only the last track is a Blues number (by Ray Charles) but Joe Sample is really gettin’ down on it. What an adorable live version!
Picture: Eddie Harris in 1973, taken from his Atlantic Double LP "Excursions" (SD 2-311). Track 12 (starts at 44:36) is from there: The hilarious "Drunk Man".