[1][2] Jazz keyboardist, bandleader and composer Sun Ra recorded dozens of singles and over one hundred full-length albums, comprising well over 1,000 songs, and making him one of the most prolific recording artists of the 20th century.
Despite the technological limitations, Ra used some innovative recording techniques, and these recordings provided an unprecedented level of documentation, and were inspirational in showing how artists could take control of production and distribution of their works.
Prior to the 1970s, most of these albums were produced in Chicago through the "El Saturn Records Research" enterprise established by Ra and his colleague Alton Abraham, while later El Saturn Records were produced in Philadelphia.
They were not as successful as hoped, and were deleted from the Impulse catalog, becoming available around the world as inexpensive "cut-outs" and making the music more widely available.
These El Saturn Records releases, dating from the 1950s to at least the late 1980s, typically had little or no information as to performers or recording dates, and sometimes didn't even list the songs on the album, often pressing one LP side from one era with another from a different decade, leading to some confusion among completists and fans.