On September 20, 1970, during the performance at Fillmore East, the Grateful Dead showcased a unique blend of acoustic and electric set, reflecting their evolving sound during this period. Just prior to this performance, they released their album "American Beauty" in November 1970, which would further solidify their place in the rock genre, especially known for songs like “Truckin’” and “Ripple” featured in the Fillmore show. This concert is particularly noteworthy as it captures the band at a pivotal moment when they were transitioning from their earlier psychedelic sound towards more folk and country influences, evident in the acoustic selections. Moreover, this performance included a blend of both classic and emerging songs, illustrating the band's commitment to spontaneous musical exploration and their growing repertoire.