Companies look like Dirac and Audyssey do this, but require you to move a microphone around a room while a test signal plays (from speakers that are usually spa

Companies look like Dirac and Audyssey do this, but require you to move a microphone around a room while a test signal plays (from speakers that are usually spaced throughout a room). The big mystery to me would be how effective such room processing can be, when you're limited to measuring from the point where the sound is generated. (My personal experience would say not very. It'd make more sense to me if the user maybe held up their iPhone as a microphone and the system calibrated itself as they moved throughout the listening space.