Composer Evan Call¡¯s musical awakening arrived with the kind of acoustics most producers spend careers trying to re-create.

¡°I remember seeing a performance when I was 14 of folk music that was actually in a cave with the natural reverb,¡± says Call, 37. ¡°They played , which is basically a medieval instrument you can play bowed or plucked, and the .

¡°To me, that sounded like magic, if magic were a sound.¡±