Let It All Out was released in 1966, & was Simone's 5th album with Philips Records. Some of the tracks are live recordings. It features "Images," an a cappella performance by Simone, based on a poem by Waring Cuney. It was a live recording sung a cappella during the same performance of songs that was featured on Nina Simone In Concert (1964). "Love Me or Leave Me" and "Mood Indigo" were also featured on Simone's debut album Little Girl Blue; these are new performances and different arrangements. Nina Simone was an American singer, songwriter, pianist, arranger, and civil rights activist who worked in a broad range of musical styles including classical, jazz, blues, folk, R&B, gospel, and pop. Simone's musical style fused gospel and pop with classical music, in particular Johann Sebastian Bach, and accompanied expressive, jazz-like singing in her contralto voice.