Regarding new Bit-Depth Information field

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%

... or ...

Format <== ['A='$regexp(%_codec%,'[\U\D]',)]['; F='%_samplerate%]['; W='%_bitspersample%]['; M='%_mode%]

DD.20151222.0755.CET, DD.20151222.1833.CET,