Chor Anno, a 38 -voice professional level choir, will perform a free concert at 3 p.m. Sept. 17 at Holy Redeemer Church, 17010 N.E. 9th St., Vancouver. Members of the ensemble are primarily choir directors and singers who work or have taught in schools and colleges in Oregon and Washington. Local members of the choir include Shannon Anderson, Ben Bouton, Billy Buhl, Rhonda Catchpole, Kimberly Claassen, Phillip Denton, April Duvic, Erik Edmundson, Margaret Green, Gary Gross, Joel Karn, and Janet Reiter. Conductor Nicole Lamartine heads the choral program at Central Washington University in Ellensburg. Learn more at choranno.org.