Smog’s ‘Knock Knock’ Turns 20

Where it really began for Bill Callahan.

It’s been 20 years since Bill Callahan, then working under the name of Smog, dropped his seventh album, Knock Knock, on Drag City.

While Callahan had already been recording for a decade, this is the album where his now highly revered songwriting fully came into its own. He hasn’t released a bad album since.

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