If upheaval and uncertainty are the undercurrents of our times, few musicians sound more like the rumblings of our discontent than L.A.’s Tennis System.

The band that shined so brightly on the city’s scene that it prompted LA Weekly to dub Tennis System “one of the city's best live acts” has returned with “Lackluster,” a track that burns with buoyant energy. Debuted on “Last Call With Carson Daly,” “Lackluster” signals a turning point for the band -- an end to dreamy disaffectedness in favor of a raucous reckoning with the demons of plasticine L.A.

[Programming descriptions are generated by participants and do not necessarily reflect the opinions of SXSW.]