======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '214'
                                          'artist'  'Big Star'
                                     'text_people'  ''
                                         'release'  'Keep An Eye On The Sky [Disc 4]'
                                           'title'  'Slut (live)'
                                           'quals'  ("['Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-2', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-1', "
 "'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-2', 'q-mixbeat-2']")
                                      'lastfmtags'  "['rock', 'pop', '70s', 'power pop', '1970s', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '16'
                                      'tracktotal'  '20'
                                            'date'  '1973'
                                        'comments'  ''
                                           'genre'  'set-pl-spelling'
                                             'bpm'  '125.470'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            '0'
'COMM:iTunNORM:eng'                                 (' 00000EC0 00000E6F 000075F0 000051C8 00023105 000212D0 0000740F 00006FE9 '
 '00014949 000328FA')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000A38 0000000000901338 00000000 004E5B98 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '20+2D95E88404861D394EDB68A6CBD5C07E+13722663'
'TALB' (Album/Movie/Show title)                     'Keep An Eye On The Sky [Disc 4]'
'TBPM' (BPM (beats per minute))                     '125.470'
'TCON' (Content type, a.k.a. Genre)                 'set-pl-spelling'
'TDRC' (Recording time)                             '1973'
'TENC' (Encoded by)                                 'iTunes 8.0.2'
'TIT2' (Title/songname/content description)         'Slut (live)'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Big Star'
'TPOS' (Part of a set)                              '4/4'
'TRCK' (Track number/Position in set)               '16/20'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['rock', 'pop', '70s', 'power pop', '1970s', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-2.41 dB'
'TXXX:replaygain_track_peak'                        '0.452780'

========================== row from database ==========================
                                              'id'  764612
                                            'path'  /data/Music/Bulk/0playlists/0novelty themes/spelling/Big Star - Slut (live).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  214
                                           'genre'  set-pl-spelling
                                        'filesize'  5142508
                                           'mtime'  1620356295
                                   'redo_metaread'  0
                                        'rest_str'   0playlists 0novelty themes spelling set pl spelling
                                      'tag_artist'  Big Star
                                     'tag_release'  Keep An Eye On The Sky [Disc 4]
                                       'tag_title'  Slut (live)
                                             'bpm'  125.47
                                    'search_title'  'live':2,3 'slut':1
                                   'search_artist'  'big':1 'star':2
                                  'search_release'  '4':9,10 'an':2 'disc':7,8 'eye':3 'keep':1 'on':4 'sky':6 'the':5
                                     'search_rest'  '0novelty':2 '0playlists':1 'pl':6 'set':5 'spelling':4 'themes':3
                                    'search_combo'  '0novelty':17 '0playlists':16 '4':14C,15C 'an':7C 'big':4B 'disc':12C,13C 'eye':8C 'keep':6C 'live':2A,3A 'on':9C 'pl':21 'set':20 'sky':11C 'slut':1A 'spelling':19 'star':5B 'the':10C 'themes':18
                                    'tag_tracknum'  16
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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-3', 'q-syn-2', 'q-chart-1', 'q-other-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['rock', 'pop', '70s', 'power pop', '1970s', 'classic rock']
                                        'tag_date'  1973
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620356295.0334651  (2021-05-07 04:58:15)
                             'size'  5142508