======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '381'
                                          'artist'  'Al Green'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  'How Can You Mend a Broken Heart'
                                           'quals'  ("['Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-2', "
 "'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-3', 'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'soundtrack-video'
                                             'bpm'  '145.685'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '145.685'
'TCON' (Content type, a.k.a. Genre)                 'soundtrack-video'
'TIT2' (Title/songname/content description)         'How Can You Mend a Broken Heart'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Al Green'
'TSOP' (Performer sort order)                       'Green, Al'
'TXXX:Artists'                                      'Al Green'
'TXXX:MP3GAIN_MINMAX'                               '000,191'
'TXXX:MP3GAIN_UNDO'                                 '+005,+005,N'
'TXXX:MusicBrainz Artist Id'                        'fb7272ba-f130-4f0a-934d-6eeea4c18c9a'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.61 dB'
'TXXX:replaygain_track_peak'                        '0.437587'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'10ca4e52-f7b4-451c-a907-c6216121726a')

========================== row from database ==========================
                                              'id'  782678
                                            'path'  /data/Music/Bulk/0soundtrack/Pulp Fiction/Notting Hill/04 - how can you mend a broken heart.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  381
                                           'genre'  soundtrack-video
                                        'filesize'  9161633
                                           'mtime'  1620334153
                                   'redo_metaread'  0
                                        'rest_str'   0soundtrack Pulp Fiction Notting Hill 04 how can you mend broken heart soundtrack video
                                      'tag_artist'  Al Green
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  How Can You Mend a Broken Heart
                                             'bpm'  145.685
                                    'search_title'  'a':5 'broken':6 'can':2 'heart':7 'how':1 'mend':4 'you':3
                                   'search_artist'  'al':1 'green':2
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '0soundtrack':1 'broken':10 'can':7 'fiction':3 'heart':11 'hill':5 'how':6 'mend':9 'notting':4 'pulp':2 'soundtrack':12 'video':13 'you':8
                                    'search_combo'  '0soundtrack':15 'a':5A 'al':8B 'album':11C 'broken':6A,24 'can':2A,21 'fiction':17 'green':9B 'heart':7A,25 'hill':19 'how':1A,20 'mend':4A,23 'non':10C 'nonalbum':12C 'notting':18 'pulp':16 'soundtrack':26 'tracks':13C,14C 'video':27 'you':3A,22
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620334152.8991604  (2021-05-06 22:49:12)
                             'size'  9161633