typeDefinition 'Objects' is used for object-based audio.
There are no additional sub-elements defined for the
typeDefinition 'Objects'. See Common Sub-elements for a list of the possible sub-elements. Even though it is defined as a common sub-element, the absoluteDistance sub-element is unlikely to be used in the 'Objects' mode.
<audioPackFormat audioPackFormatID="AP_00031002" audioPackFormatName="PackObj2" typeLabel="0003" typeDefinition="Objects" importance="7"> <audioChannelFormatIDRef>AC_00031003</audioChannelFormatIDRef> </audioPackFormat>