Variability – the trio of Busses engages the sonic experimentation with an ear pointed toward the openness it provides, performing songs that stretch the end lines while the core instrumentation remains locked-in pushing fluidly forward. Their latest single “Overload” takes that core groove coupling it with Dave Brett’s gentle, floating vocal arrangement, creating a subtle, drifting out-to-sea effect. However, the group has been known to harbor a heavier harder aesthetic. Tonight, at Johnny Brenda’s, they bridge the gap between harmonious local folk group Rosu Lup, who take that zoomed in intimacy and project it outward, exuding a natural warmth. Having gone through a pair of lineup changes, Rosu Lup is currently working on a full-length LP, which may be available this coming fall. Their performance should offer a preview of that new material. The show is alo headlined by Richmond, Virginia garage-pop/psych rockers Avers, who released their debut album Empty Light earlier this spring. Johnny Brenda’s, 1201 N. Frankford Ave., 8pm, $12, 21+ – Michael Colavita