Ned Lagin and Seastones

"In April [ 1975 ] Phil Lesh and electronic music wizard Ned Lagin put out SEASTONES, an album of experimental "electronic cybernetic biomusic," in the words of a Dead Heads newsletter.

Lagin and Lesh made several appearances at Dead [Grateful Dead] shows before the "retirement," opening the second sets of their final week at Winterland with a section of apparently formless electronic cacophony- high tweedles, rumbling bass notes that vibrated the entire hall, waterfalls of swooshes, bleeps and assorted noises that defy onomatopoetic description.

The album is considerably more sophisticated than what the pair could manage live, however. On the LP, Lagin performs his compositions on a huge battery of synthesizers and keyboards, including such experimental instruments as a then-revolutionary digital-polyphonic keyboard developed by E-mu systems, a custom setup by electronic music pioneer Don Buchla, an Interdata 7/16 digital computer (used for processing the music), and scads of other high-tech machines. Lesh's bass during this era was a futuristic marvel to behold, as well a fully electronic bass developed by Alembic that allowed him to independently process the signals from each string of his instrument."

Title link takes you to more info on the album including a full download. Via Amos.