Otis Blue: Otis Redding Sings Soul, or simply Otis Blue, is the third studio album by soul singer Otis Redding, released September 15, 1965 on Stax Records. "I've Been Loving You Too Long" was originally recorded and released as a mono single in April 1965 whilst the rest of Otis Blue was recorded in a 24-hour period over 9/10th July, and mainly features cover songs by popular R&B and soul artists. Two other original songs "Ole Man Trouble" and "Respect" were written during the sessions in the Stax Recording Studios in Memphis, Tennessee. Otis Blue was critically acclaimed upon release and became Redding's most successful studio album to date, peaking at number 6 on the UK Albums Chart, and his first to reach the top spot of the Billboard R&B chart. Furthermore, it produced three popular singles, all charting at least in the top 50 on both the Billboard R&B and the Billboard Hot 100 chart. It is considered by many critics to be Redding's first fully realized album.
On April 22, 2008, Rhino Records released a two-disc Collectors Edition of Otis Blue, consisting of numerous alternate mixes, rarities, several live performances, the B-sides "Any Ole Way" and "I'm Depending on You", as well as the original LP in mono and stereo sound.