Nearly every “Feedback” The Grateful Dead played in 1969 included a gentle, gorgeous section of drones, whines, and knob-twiddling. This mix isolates and combines 14 such passages into a 35-minute ambient album.

This particular aspect of “Feedback” ought to have its own name, since literal feedback is not the dominant feature, and there is great consistency among the performances. When you put them together, they sound like movements of a single, larger composition... or stanzas in a tone poem.

The mix includes 14 tracks, each labeled “Tones (mm/dd/69).”

35-minute mp3 album zipped up here