In territories that use HI or VI-N channels, these will continue to be available
with both 7.1- and 5.1-channel audio tracks. With existing 5.1 DCPs, Audio
Description is commonly placed on both channels 7 and 8 in order to provide
maximum flexibility, but over time this will migrate to channel 16 for all
5.1-channel, 7.1-channel, and future audio formats.