These introductory pieces are followed by an exhaustive set of calibration tones including: Channel Identification Tests, 7.1, 5.1, 2.0 in all of the new HD codecs from Dolby and DTS Speaker Balance Tests, 7.1, 5.1, 2.0 Speaker Phase Tests Check the phase of each speaker pair Frequency Sweep Tests Test for rattles or room nodes Subwoofer Sweep TestTest for low frequency rumble Subwoofer Crossover Test Check your crossover frequency The technology of recording in real surround HD-Audio coupled with the capability of the blu-ray format to deliver HD-Video brings the intimacy of the performance into your own personal listening space. Watch it with the video or simply sit back and revel in the music as it is passed between members of the group.