Kirtan (Sanskrit: “to repeat”; also Sankirtan) is call-and-response chanting or “responsory” performed in India’s devotional traditions. I had to ask David to repeat the word a couple times. A “kir-what???”? “Kirtan,” he replied. “There’s one in a few minutes. Shall we?” “Oh. Ok. But, what is it?” “Oh you have so much to learn!” he…