MP3Header :: id - MP3 Identifier
The identifier is always "ID3". The ID cannot be changed. When the first three characters in the header differ from "ID3", the header is considered to be invalid. When creating a new header, the value is automatically set.
Return value: Name ( odaba::String & )
Implementation details
odaba::String
MP3Header  :: id (  )
The value should always be "ID3". In case of invalid MP3 header, the property contains an invalid (empty) identifier string.