======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '4'
                                          'artist'  '[dialogue]'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  'Red Queen'
                                           'quals'  ("['Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-2', "
 "'q-syn-2', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                                      'lastfmtags'  "['soundtrack', '8 of 10 stars', 'speech', 'drama', 'blah']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'soundtrack-video'
                                             'bpm'  '145.163'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '145.163'
'TCON' (Content type, a.k.a. Genre)                 'soundtrack-video'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'Red Queen'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               '[dialogue]'
'TSOP' (Performer sort order)                       '[dialogue]'
'TXXX:Artists'                                      '[dialogue]'
'TXXX:MP3GAIN_MINMAX'                               '101,209'
'TXXX:MP3GAIN_UNDO'                                 '+001,+001,N'
'TXXX:MusicBrainz Artist Id'                        '314e1c25-dde7-4e4d-b2f4-0a7b9f7c56dc'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['soundtrack', '8 of 10 stars', 'speech', 'drama', 'blah']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.89 dB'
'TXXX:replaygain_track_peak'                        '0.368092'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'5cc59483-1f95-4a48-8504-2a0206288ad6')

========================== row from database ==========================
                                              'id'  780899
                                            'path'  /data/Music/Bulk/0soundtrack/Resident Evil OST/01 -(null) -  Red Queen.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  4
                                           'genre'  soundtrack-video
                                        'filesize'  113025
                                           'mtime'  1620334200
                                   'redo_metaread'  0
                                        'rest_str'   0soundtrack Resident Evil OST 01 (null) soundtrack video
                                      'tag_artist'  [dialogue]
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  Red Queen
                                             'bpm'  145.163
                                    'search_title'  'queen':2 'red':1
                                   'search_artist'  'dialogue':1,2
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '0soundtrack':1 'evil':3 'null':5,6 'ost':4 'resident':2 'soundtrack':7 'video':8
                                    'search_combo'  '0soundtrack':10 'album':6C 'dialogue':3B,4B 'evil':12 'non':5C 'nonalbum':7C 'null':14,15 'ost':13 'queen':2A 'red':1A 'resident':11 'soundtrack':16 'tracks':8C,9C 'video':17
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-1', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['soundtrack', '8 of 10 stars', 'speech', 'drama', 'blah']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620334200.1219592  (2021-05-06 22:50:00)
                             'size'  113025