General compliance
Syntaxically correct but resulting bitstream is not coherent and may not be fit a specific constraint
configLen is 0 but it is recommended to have a preroll config
(preroll count field) is (value) but (expected value) is recommended due to (reason)
This is the first frame in this stream but USAC AudioPreRoll is not present
AudioPreRoll is present in position (value) but only presence in position 0 is allowed
channelConfigurationIndex (value) is used but the usacElementType sequence contains (channel config order), which is the configuration indicated by channelConfigurationIndex (expected value)
Default loudness is present (value) times but only 1 instance is recommended
loudnessInfoSet contains a mix of v0 and v1 loudnessInfo
loudnessInfoCount is 0
loudnessInfoSet is missing
(element) is present (value) times but only 1 instance is recommended
(methodDefinition-measurementSystem) is present (value) times but only 1 instance is recommended
numOutChannels is (value) but the usacElementType sequence contains (value) channels
numOutChannels is (value), it is not recommended that the usacElementType sequence contains (value) channels
numOutChannels is (value), it is not recommended that the usacElementType sequence contains (value) channels, especially when only one channel of a CPE is included in numOutChannels
(container format) (container element) is not present and this is an independent frame (IF), seeking is not optimal
(attribute name) attribute is not part of specs
(element name) element is not part of specs
(element name) element count (element count) is not permitted, (min or max) is (max count) (extra spec name if needed)