Atmos is Dolby’s immersive sound system, which debuted a year ago with Disney/Pixar’s Brave, a mix on which Files also worked. Since then, the sound system has been used or scheduled for use ...

Early this year, Sony, Universal and Warner Bros. movie studios chose Dolby Digital Plus as their preferred means to deliver surround sound for their UltraViolet common file format (CFF) downloads.

In the Save Exported File As window that appears, choose Sound to AIFF from the Export pop-up menu and click Save to create an AIFF audio file. Export through QuickTime to extract your movie’s ...