======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '218'
                                          'artist'  'Lighthouse Family'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  "Ain't No Sunshine"
                                           'quals'  ("['Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-2', 'Q-UNU-1', "
 "'q-syn-2', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-2', 'q-mixbeat-1']")
                                      'lastfmtags'  "['britpop', 'soul', 'british', 'easy listening', 'pop', 'alternative']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'soundtrack-video'
                                             'bpm'  '112.072'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '112.072'
'TCON' (Content type, a.k.a. Genre)                 'soundtrack-video'
'TIT2' (Title/songname/content description)         "Ain't No Sunshine"
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Lighthouse Family'
'TSOP' (Performer sort order)                       'Lighthouse Family'
'TXXX:Artists'                                      'Lighthouse Family'
'TXXX:MP3GAIN_MINMAX'                               '000,189'
'TXXX:MP3GAIN_UNDO'                                 '+004,+004,N'
'TXXX:MusicBrainz Artist Id'                        '3ebe18d1-dfb6-41eb-8447-4a7693f79d9a'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['britpop', 'soul', 'british', 'easy listening', 'pop', 'alternative']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.78 dB'
'TXXX:replaygain_track_peak'                        '0.569847'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'1e37dd2d-ee49-40d0-b64a-180bf7229668')

========================== row from database ==========================
                                              'id'  1498048
                                            'path'  /data/Music/Bulk/0soundtrack/Pulp Fiction/Notting Hill/08 - ain_t no sunshine.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  218
                                           'genre'  soundtrack-video
                                        'filesize'  5247654
                                           'mtime'  1620334154
                                   'redo_metaread'  0
                                        'rest_str'   0soundtrack Pulp Fiction Notting Hill 08 ain_t sunshine soundtrack video
                                      'tag_artist'  Lighthouse Family
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  Ain't No Sunshine
                                             'bpm'  112.072
                                    'search_title'  'ain':1 'aint':3 'no':4 'sunshine':5 't':2
                                   'search_artist'  'family':2 'lighthouse':1
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '0soundtrack':1 'ain':6 'fiction':3 'hill':5 'notting':4 'pulp':2 'soundtrack':9 'sunshine':8 't':7 'video':10
                                    'search_combo'  '0soundtrack':13 'ain':1A,18 'aint':3A 'album':9C 'family':7B 'fiction':15 'hill':17 'lighthouse':6B 'no':4A 'non':8C 'nonalbum':10C 'notting':16 'pulp':14 'soundtrack':21 'sunshine':5A,20 't':2A,19 'tracks':11C,12C 'video':22
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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-4', 'q-syn-2', 'q-chart-2', 'q-other-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['britpop', 'soul', 'british', 'easy listening', 'pop', 'alternative']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620334153.5085783  (2021-05-06 22:49:13)
                             'size'  5247654