Read
The ADR field shows the type of information encoded in the Q
MCV
If the MCV bit is one, the media catalog number field is valid.
There are identify numbers according to the UPC/EAN cording in the media catalog number field. If all data in this field is ASCII 0, there is no media catalog number in the field.
TCV
If the TCV bit is one, the ISRC field is valid. In this field, there are identify numbers according to the ISRC standard.
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