Brian D’Addario, 23, and his brother Michael, 21, were still teenagers when they signed with legendary indie label 4AD and released their debut album as The Lemon Twigs, co-produced by Foxygen’s Jonathan Rado. The Long Island siblings are both singer-songwriters and multi-instrumentalists who expertly evoke the sound and spirit of ‘60s and ‘70s rock at its most melodic — and they’ve already impressed heroes like Todd Rundgren and Elton John. But their recently issued third album, Songs for the General Public, is the kind of confident step into a brighter spotlight that its title implies — the sound of former teen prodigies now in the prime of their talents. Brian D’Addario spoke to SPIN about how their new album contrasts with their last effort, the whimsical 2018 rock opera Go To School, ...