In the late 1960s and early 1970s, the Grateful Dead developed a new form of improvisational space music in their extended formless jam sessions during live concerts (which their fans referred to as "Space" though the band did not formally assign that title), and their experimental space music albums such as Aoxomoxoa, and later in the 1980s, Infrared Roses, and Grayfolded. Band member Phil Lesh released experimental space music recording "Seastones" with computer music pioneer Ned Lagin in 1975, one of the first albums to be issued in the innovative but commercially unsuccessful format SQ-Quadwith. Lagin used in real-time stage and studio performance of minicomputers driving real-time digital to analog converters, prior to the commercial availability of digital synthesizers in the early 1980s.