There’s nothing more entrancing than a buoyant, harmony-drenched sound that lights up a room with a welcome warm glow. LA-based guitarists and singers Trevon Bahnson, Ethan Glazer and Daniel Wright, who make up folk-pop trio Song Preservation Society, did just that with last year’s excellent EP “Ready Room”, which displayed three musicians with a deft touch for vibrant melodies and ever-changing rhythmic chord changes. Though they’re currently touring all across America supporting He’s My Brother, She’s My Sister, they’re setting an anchor on their hometown with what should be a wholesome set at El Rey on October 26th.