The Avett Brothers are “three-quarters of the way done” with their next Rick Rubin-produced LP, and perhaps the most intriguing potential preview of the forthcoming set — in addition to new tune “The Once and Future Carpenter” — is the fact that Seth Avett has been honoring the late, great Elliott Smith in recent months. Most notably, his take on “Angeles” proved an ability to invoke Smith’s near-inimitable balance of delicate, nuanced emotion with daunting technical chops. This week in Oakland, California, Avett and Jessica Lea Mayfield brought the house down with a reverent duet rendition of late-period Smith tearjerker “Twilight.” Check out a decent fan-shot clip above.