The album was mixed in quadraphonic sound, released in
quad-encoded stereo, and featured guest performances by members of the
Grateful Dead, including
Jerry Garcia playing processed electric and pedal steel guitars, and voice;
Phil Lesh playing electronic Alembic bass; and
Mickey Hart on processed percussion.
David Crosby (processed voice and electric 12-string guitar), and members of the
Jefferson Airplane Grace Slick (processed voice),
Spencer Dryden (processed percussion), and
David Freiberg (processed voice) also appear on the album.
Seastones was re-released in stereo on CD by Rykodisc in 1990. The CD version includes the original Round Records nine-section
Seastones (42:34) from February 1975, and a previously unreleased, six-section version (31:05) from December 1975. Both are partial versions of the full composition, which has not been released. Other unreleased Lagin
Seastones-related compositions from the same period include
L and
Make a Cat Laugh. It includes most of the original 1970–1974 studio forms, those parts of Lagin's concurrent but unfinished composition
L that are shared with
Seastones, as well as some of the moment forms generated and incorporated into the composition from live performances that took place from 1973 to 1975. This two CD album contains 83 tracks (54 tracks on CD One and 29 tracks on CD Two) and altogether is 111 minutes long. ==Live performances==