Mark Kozelek has been producing sullen, thoughtful music for nearly two decades.

The former frontman of 1990's San Francisco Red House Painters now writes to the muse of misery under his own name or with band Sun Kil Moon.

A packed Audio - the gig was originally scheduled for Concorde 2 - heard much of his most recent album, April.

His music remains dark and brooding, but there are moments of hope which, like a cloud break on a harvest moon, seemed to light up the gloom.

These come from shifts up his vocal timbre, moving from morose to heightened emotion, giving the songs an epic edge over and above their length.

His lyrics are taken from the top drawer of song-writing, but it is a shame his depressed delivery sometimes masked the words for those not well-versed in his discography.

But it is his masterful guitar work which most inspires and impresses.

Using a range of alternative tunings, he creates innovative arpeggio and chord progressions, switching from a rich gauze of sound to clear, chiming notes.

His compositions are a lesson in how to breathe life, and death, into this folk-indie genre.