======================== unified (from filesystem) ========================
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                                        'duration'  '167'
                                          'artist'  'William Fitzsimmons'
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                                           'title'  "They'll Never Take The Good Ye"
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                                      'lastfmtags'  "['indie', 'acoustic', 'mellow', 'folk', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  ''
                                            'date'  '2009'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-indie'
                                             'bpm'  '121.701'
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                                        'acoustid'  ''
rest: ''

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

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'COMM:iTunes_CDDB_TrackNumber:eng'                  '10'
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'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-indie'
'TDRC' (Recording time)                             '2009'
'TENC' (Encoded by)                                 'iTunes 8.0.1'
'TIT2' (Title/songname/content description)         "They'll Never Take The Good Ye"
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'William Fitzsimmons'
'TRCK' (Track number/Position in set)               '10'
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'TXXX:lastfmtags'                                   ['indie', 'acoustic', 'mellow', 'folk', 'singer songwriter']
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'TXXX:q-drums'                                      '1'
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========================== row from database ==========================
                                              'id'  1519132
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/William Fitzsimmons/The Sparrow And The Crow/10 they_ll never take the good years.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  167
                                           'genre'  ifs-songwriter-indie
                                        'filesize'  6713226
                                           'mtime'  1637330525
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos And 10 they_ll never take the good years ifs songwriter indie
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                                     'tag_release'  The Sparrow and The Crow
                                       'tag_title'  They'll Never Take The Good Ye
                                             'bpm'  121.701
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                                   'search_artist'  'fitzsimmons':2 'william':1
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                                    'search_combo'  '00singer':15 'and':13C,18 'crow':14C 'eos':17 'fitzsimmons':10B 'good':7A,24 'ifs':26 'indie':27 'll':2A,20 'never':4A,21 'songwriter':16 'sparrow':12C 'take':5A,22 'the':6A,11C,23 'they':1A,19 'theyll':3A 'william':9B 'ye':8A 'years':25
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'acoustic', 'mellow', 'folk', 'singer songwriter']
                                        'tag_date'  2009
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1637330524.939595  (2021-11-19 15:02:04)
                             'size'  6713226