Just about half way through their performing career, 1980 was a very interesting year for the Grateful Dead.
The Good Old Grateful Dead Daze were gone and the deep soul of 1989-1990 was yet to come. The 1980 sound is very striped down and Jerry’s playing is hot. Some of this is captured on the Dead.Net CD: Going to Nassau.
The Internet Archive has a vast collection of Grateful Dead concerts including 1980 and specifically (for our purposed today) the April Fools Day concert at the Capital Theater. The sound quality is good and the band is alive (this is the second date on their 1980 spring tour and the second night at the Capital).