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@@ -1870,6 +1870,7 @@ This section specifies the conformance points of the base-enhanced profile.
When the [=primary_profile=] field is set to 2, the following constraints apply to the [=IA Sequence=]:
- There SHALL be at least one [=Mix Presentation OBU=] for at most 28 [=Audio Element=]s that parsers, which comply with the base-enhanced profile, recognize.
- If [=additional_profile=] is set to less than or equal to 2, there SHALL be at most 28 channels in total across all [=Audio Element=]s in the [=IA Sequence=] that parsers complying with the base-enhanced profile can recognize. Otherwise, there MAY be more than 28 channels or 28 [=Audio Element=]s in the [=IA Sequence=].
Capabilities of the IA parser, decoder, and processor:
- They SHALL be able to support the capabilities of the [[#profiles-base|Base Profile]].
