The singular new-music ensemble Sō Percussion, celebrated for its “exhilarating blend of precision and anarchy, rigor and bedlam” (The New Yorker), plays two concerts highlighting three millennial voices that are part of an inspiring generation of women composers revitalizing the contemporary music landscape. In this quartet’s first visit, two short pieces by Puerto Rican-born composer Angélica Negrón explore interactions between the quartet’s percussion instruments and pre-programmed electronic noisemakers, and Nathalie Joachim’s Note to Self combines pre-recorded loops of her own voice with virtuosic percussion writing as a way of processing her chronic anxiety.