Curated by guitarist Kim Thayil, "Echo Of Miles" features original B-sides, unreleased tracks, instrumentals, covers and demos. "As album sets go, this one has been fun to collect and compile over the decades," says Thayil. "I personally may have referenced this project a number of times over the years, going back almost twenty of them to the mid-Nineties!"

Disc 1, dubbed "Originals", is filled with Soundgarden songs - mainly B-sides - in addition to two unreleased tunes, "Kristi" and "Storm."

Disc 2, "Covers", presents covers of tracks by The Beatles, The Rolling Stones, The Doors, The Ramones, Devo and others.

Disc 3, "Oddities", offers instrumentals, remixes and demos, including Steve Fisk's unreleased "The Telephantasm (Resurrection Remix)", "Twin Tower" written by Matt Cameron, which was originally recorded at Seattle's London Bridge studio in December 1988 during the sessions for "Louder Than Love", and "Night Surf", an instrumental performed by bassist Ben Shepherd.