Undiluted is an album by jazz pianist Wynton Kelly recorded in 1965 and released on the Verve label featuring performances by Kelly with Paul Chambers and Jimmy Cobb with flautist Ray Stevenson added on one track.

The Allmusic review awarded the album 3 stars.

William Harrison "Bill" Withers, Jr. (born July 4, 1938) is an American singer-songwriter and musician who performed and recorded from 1970 until 1985. He recorded a number of hits such as "Lean on Me", "Ain't No Sunshine", "Use Me", "Just the Two of Us", "Lovely Day", and "Grandma's Hands". His life was recently the subject of the documentary film Still Bill.

Withers was born the youngest of six children in the small coal-mining town of Slab Fork, West Virginia. Raised in nearby Beckley, West Virginia, Withers was twelve years old when his father died. He enlisted with the United States Navy at age eighteen and served for nine years, during which time he became interested in singing and writing songs. Soon after his discharge from the Navy in 1965, he relocated to Los Angeles in 1967 for a musical career.

Withers worked as an assembler for several different companies, including Douglas Aircraft Corporation, while recording demo tapes with his own money, shopping them around and performing in clubs at night. When he debuted with the song "Ain't No Sunshine" he refused to resign his job because of his belief that the music business was a fickle industry and that he was still a novice compared to other acts.