Doctrine is an experimental pop project from California-based chamber choir SACRA/PROFANA, an organization dedicated to “awakening and nurturing enthusiasm for the choral art.”¬†While choral music has occasionally found its way into various genres of music (shoutout to this relatively obscure gem from 2014), basing an entire music project on a foundation of chamber is fairly novel, and certainly breathes new life into what they refer to as the “choral art.” With only two songs out under the Doctrine name, it remains to be seen how this will take shape as a body of work, but “Play” is an arresting introduction that demands attention. Pop, electronic and chamber choir are three ingredients that seem to have been begging to be mixed.