The group subsequently released an EP titled A Bunch of Stuff, which consisted entirely of covers, alternative versions, and remixes of tracks from the album.

James Murphy recorded Sound of Silver at Long View Farm in Massachusetts, where he had previously worked on LCD Soundsystem's eponymous debut album.

On March 12, 2007, coinciding with the album's official UK release, an underground remix version of Sound of Silver was made available online to support a charitable cause.

"[16] Dorian Lynskey of The Guardian praised the "devastating emotional punch" of "Someone Great" and "All My Friends," describing the album as "dance-rock for grown-ups: extraordinary.

"[20] Andy Kellman of AllMusic noted that Sound of Silver, compared to LCD Soundsystem, was "less silly, funnier, less messy, sleeker, less rowdy, more fun, less distanced, more touching.

"[17] Ann Powers of the Los Angeles Times wrote that Murphy "succeeds by stretching in two directions—finding a new musical center and showing his humanity beyond the laughs.

"[21] Mark Pytlik of Pitchfork commended Murphy's production expertise and the album's "deep, spacious, and full-blooded" sound, concluding, "It's an absolute joy to listen to, for every possible reason, not the least of which is because, these days, those epiphanies feel like they're coming fewer and farther between.

"[23] Tim Jonze of NME wrote that while "Murphy's wise enough never to let his showing off spoil the fun, he can't avoid investing these songs with heart and soul ... that's what'll keep you hooked long after the beats have worn you out.

"[27] John Mulvey of Uncut stated, "Murphy's talent is to proudly flaunt his influences, and to mix them up with belligerence, an exhilarating grasp of rock and dance dynamics, and a powerfully snarky sense of humor.

[44] In 2009, Pitchfork named the track "All My Friends" as the second best song of the decade,[45] while a month later Sound of Silver was ranked at number 17 in the website's list of the best albums of the 2000s.