“The Art of Sound,” the documentary series co-produced by L-Acoustics and Black Meteor, returns with its second episode — arriving in two parts and built on the series’ premise: that sound is not decoration, but a fundamental force shaping human biology, emotion, and culture. Part I, featuring Houston trio Khruangbin , explores the physiological response to sound through live heart-rate monitoring research. Part II shifts to Brazilian DJ, producer, and philanthropist Alok, examining how sound