Join DC-area chamber chorus, Voices XXI (Voices 21), for a performance meant to evoke a "mosaic" of emotions, from grief and compassion to joy and peace. The concert will include motets from classical greats such as Brahms, Mendelssohn, and Sermisy, as well as contemporary pieces such as Eliza Gilkyson's "Requiem," which was written for the 2004 Asian tsunami victims.