======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '257'
                                          'artist'  'Keren Ann'
                                     'text_people'  ''
                                         'release'  'Keren Ann'
                                           'title'  "Ain't No Crime"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
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                                      'lastfmtags'  ("['indie', 'chanson francaise', 'female vocalists', 'french', 'singer "
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                                     'discogstags'  "['blues', 'pop', 'chanson']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  ''
                                            'date'  '2007'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter'
                                             'bpm'  '132.271'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

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'TBPM' (BPM (beats per minute))                     '132.271'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter'
'TDRC' (Recording time)                             '2007'
'TIT2' (Title/songname/content description)         "Ain't No Crime"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Keren Ann'
'TRCK' (Track number/Position in set)               '5'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
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'TXXX:Q-LOCALNESS'                                  '3'
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========================== row from database ==========================
                                              'id'  1519512
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Keren Ann/Keren Ann/05. it ain_t no crime.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  257
                                           'genre'  ifs-songwriter
                                        'filesize'  6172749
                                           'mtime'  1621630292
                                   'redo_metaread'  0
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                                     'tag_release'  Keren Ann
                                       'tag_title'  Ain't No Crime
                                             'bpm'  132.271
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                                   'search_artist'  'ann':2 'keren':1
                                  'search_release'  'ann':2 'keren':1
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                                    'tag_tracknum'  5
                                      'num_images'  0
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                                      'lastfmtags'  ['indie', 'chanson francaise', 'female vocalists', 'french', 'singer songwriter']
                                        'tag_date'  2007
                                     'discogstags'  ['blues', 'pop', 'chanson']

============================== file details ==============================
                                           'mtime'  1621630291.842191  (2021-05-21 22:51:31)
                             'size'  6172749