This says it can be added to a DVD audio track, and that it is added by the authoring system (just not Encore).
http://www.ifpi.org/content/section_resources/isrc_handbook.html#Headi ng284
This says it can be added to a DVD audio track, and that it is added by the authoring system (just not Encore).
http://www.ifpi.org/content/section_resources/isrc_handbook.html#Headi ng284