======================== unified (from filesystem) ========================
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                                        'duration'  '315'
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                                      'lastfmtags'  "['thrash', 'speed metal', 'thrash metal', 'metal', 'heavy metal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  '11'
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'eid-metal-speedmetal'
                                             'bpm'  '137.013'
                                             'key'  '9A'
                                        'acoustid'  '2668073a-785f-4234-9834-d34155721bee'
rest: ''

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'TDRC' (Recording time)                             '2004-04-26'
'TIT2' (Title/songname/content description)         'Never Me'
'TKEY' (Initial key)                                '9A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Death Angel'
'TPE2' (Band/orchestra/accompaniment)               'Death Angel'
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'TPUB' (Publisher)                                  'Nuclear Blast'
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'TSO2'                                              'Death Angel'
'TSOP' (Performer sort order)                       'Death Angel'
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'TXXX:MusicBrainz Album Type'                       'album'
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========================== row from database ==========================
                                              'id'  1309557
                                            'path'  /data/Music/Bulk/00poprockelectronic/Death Angel/The art of dying/11 - never me.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  315
                                           'genre'  eid-metal-speedmetal
                                        'filesize'  7584755
                                           'mtime'  1620311693
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic art dying 11 never me eid metal speedmetal
                                      'tag_artist'  Death Angel
                                     'tag_release'  The Art of Dying
                                       'tag_title'  Never Me
                                             'bpm'  137.013
                                    'search_title'  'me':2 'never':1
                                   'search_artist'  'angel':2 'death':1
                                  'search_release'  'art':2 'dying':4 'of':3 'the':1
                                     'search_rest'  '00poprockelectronic':1 'art':2 'dying':3 'eid':6 'me':5 'metal':7 'never':4 'speedmetal':8
                                    'search_combo'  '00poprockelectronic':9 'angel':4B 'art':6C,10 'death':3B 'dying':8C,11 'eid':14 'me':2A,13 'metal':15 'never':1A,12 'of':7C 'speedmetal':16 'the':5C
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-4', 'Q-HAP-1', 'q-bass-3', 'q-grit-4']
                                      'lastfmtags'  ['thrash', 'speed metal', 'thrash metal', 'metal', 'heavy metal']
                                        'tag_date'  2004
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620311692.9354548  (2021-05-06 16:34:52)
                             'size'  7584755