King Crimson's live 'USA' was the last album with Robert Fripp, John Wetton, Bill Bruford and David Cross.
The group will put out three concerts recorded between 1969 and 1974 on April 18.
Drummer Johnny Elichaoff, known as Johnny Toobad during a stint with King Crimson's Robert Fripp, has died in an apparent suicide.
Forty-five years later, King Crimson's daring debut remains prog's standard bearer, the best example of a then-emerging movement that sought to combine European musical concepts with rock.
At the time, King Crimson's 'Red' was decidedly disappointing, an album without a band that spent just a single week on the British chart, stopping at No. 45.
For years, the so-called 'Blue Tapes' have been among the most sought-after items for King Crimson fans, coveted as much for the musical clarity on display during these 1973-74 concerts as for their scarcity.
Robert Fripp has announced that a new configuration for King Crimson will tour America this fall.
King Crimson's 'Starless and Bible Black' was released on March 29, 1974.