... or ...
FORMAT <== 'A='$regexp(%_codec%,'[\U\D]',)'; F='%_samplerate%['; W='%_bitspersample%]'; M='%_mode%... or ...
Format <== ['A='$regexp(%_codec%,'[\U\D]',)]['; F='%_samplerate%]['; W='%_bitspersample%]['; M='%_mode%]DD.20151222.0755.CET, DD.20151222.1833.CET,