But if you’re a fan of musicals and want a hauntingly good movie that will really put your surround-sound ... 5.1 and 7.1 tracks available is a key reason the Blu-ray is a great test disc ...

Here’s everything you need to know about Apple’s new surround sound tech and how it works. The tech essentially takes a 5.1, 7.1 or Dolby Atmos signal, and applies a series of audio filters ...