Extensive field recordings were begun in 1964 and expanded to include film documentation beginning in early/mid 1969, including sessions in Chicago, St. Louis, Memphis and the Mississippi Delta. In the 1970s, the label began issuing folk, jazz and blues-rock albums. The latter were significantly important to the development of that genre.
The recording process started in 1964 with field recordings, expanding to include film documentation from early/mid 1969, including sessions in various locations like Chicago, St. Louis, Memphis, and the Mississippi Delta. The label began releasing folk, jazz, and blues-rock albums in the 1970s, which were crucial for the development of that genre.