I promised to devote this column to a consideration of how audio metering varies in level as a function of various weighting schemes and the B.S. 1770 algorithm. However, over the past month, I’ve ...

“Take a deep breath” appears on a serene blue background when you open the Calm app, followed by the sound of rain. In the five years since launch, Calm has been downloaded 12 million times, adding 30 ...