======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '262'
                                          'artist'  'Roberta Kelly'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'My Sweet Lord'
                                           'quals'  ("['Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-UNU-1', 'Q-OLDST-2', "
 "'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-1', "
 "'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-2']")
                                      'lastfmtags'  "['disco', '70s', 'female vocalists', 'soul', 'pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '059.3'
                                      'tracktotal'  ''
                                            'date'  '1978'
                                        'comments'  ''
                                           'genre'  'set-pl-spelling'
                                             'bpm'  '133.053'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         '256 S 4.20'
'COMM:ID3v1 Comment:XXX'                            '256 S 4.20'
'TBPM' (BPM (beats per minute))                     '133.053'
'TCON' (Content type, a.k.a. Genre)                 'set-pl-spelling'
'TDRC' (Recording time)                             '1978'
'TIT2' (Title/songname/content description)         'My Sweet Lord'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Roberta Kelly'
'TPE2' (Band/orchestra/accompaniment)               'Roberta Kelly'
'TRCK' (Track number/Position in set)               '059.3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['disco', '70s', 'female vocalists', 'soul', 'pop']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.01 dB'
'TXXX:replaygain_track_peak'                        '0.595403'
'UFID:'                                             UFID(owner='', data=b'XL\x00 d1978_059.3')

========================== row from database ==========================
                                              'id'  770270
                                            'path'  /data/Music/Bulk/0playlists/0novelty themes/spelling/Roberta Kelly - My Sweet Lord.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  262
                                           'genre'  set-pl-spelling
                                        'filesize'  8316140
                                           'mtime'  1620356396
                                   'redo_metaread'  0
                                        'rest_str'   0playlists 0novelty themes spelling set pl spelling
                                      'tag_artist'  Roberta Kelly
                                     'tag_release'  None
                                       'tag_title'  My Sweet Lord
                                             'bpm'  133.053
                                    'search_title'  'lord':3 'my':1 'sweet':2
                                   'search_artist'  'kelly':2 'roberta':1
                                  'search_release'  
                                     'search_rest'  '0novelty':2 '0playlists':1 'pl':6 'set':5 'spelling':4 'themes':3
                                    'search_combo'  '0novelty':7 '0playlists':6 'kelly':5B 'lord':3A 'my':1A 'pl':11 'roberta':4B 'set':10 'spelling':9 'sweet':2A 'themes':8
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-1', 'q-other-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['disco', '70s', 'female vocalists', 'soul', 'pop']
                                        'tag_date'  1978
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620356395.9273539  (2021-05-07 04:59:55)
                             'size'  8316140