Philadelphia-based booking collective All Mutable continue to organize noteworthy shows in town, and this weekend’s event is no exception to this trend. Shimmer’s lineup consists of four artists who are each arriving from projects that have become distinguished for their potent blends of musical precision and tonal experimentation. Ani and Nina perform together in Palberta, Paco plays in Big Neck Police and releases solo material under the moniker The Cradle, and Simon plays in Cloud Becomes Your Hand and Tredici Bacci (who recently toured with Gary Wilson as his backing band). The resulting sound is something akin to transcendental no-wave sludge swinging on a pendulum. Find out for yourself what will come of this rare melding of talent on tonight at Baird Mansion Atrium, where they’ll be performing with Philly artists Ursula, Deflector, and Boston-based Pucker Up. Baird Mansion Atrium, (Please contact of the acts or venue for more info.), 7pm, $8, All Ages – Josh Kelly