======================== unified (from filesystem) ========================
                                         'bitrate'  '213.302'
                                        'duration'  '303'
                                          'artist'  'Shining'
                                     'text_people'  ''
                                         'release'  'Grindstone'
                                           'title'  '1:4:9'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'Q-PLAY-2', 'q-bass-3', 'q-busy-3', 'q-grit-3', "
 "'Q-PIANO-2', 'q-chart-2', 'q-drums-3', 'q-other-4', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['suicidal black metal', 'swedish', 'black metal', 'experimental', "
 "'depressive black metal']")
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '11'
                                      'tracktotal'  ''
                                            'date'  '2007'
                                        'comments'  ''
                                           'genre'  'eid-metal-black'
                                             'bpm'  '139.948'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Grindstone'
'TBPM' (BPM (beats per minute))                     '139.948'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-black'
'TDRC' (Recording time)                             '2007'
'TENC' (Encoded by)                                 'Exact Audio Copy   (Secure mode)'
'TIT2' (Title/songname/content description)         '1:4:9'
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'Shining'
'TRCK' (Track number/Position in set)               '11'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['suicidal black metal',
 'swedish',
 'black metal',
 'experimental',
 'depressive black metal']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.30 dB'
'TXXX:replaygain_track_peak'                        '0.704296'

========================== row from database ==========================
                                              'id'  1399456
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Shining/11 - 1 4 9.mp3
                                         'working'  None
                                         'bitrate'  213
                                    'duration_sec'  303
                                           'genre'  eid-metal-black
                                        'filesize'  8097792
                                           'mtime'  1620301791
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal 11 eid metal black
                                      'tag_artist'  Shining
                                     'tag_release'  Grindstone
                                       'tag_title'  1:4:9
                                             'bpm'  139.948
                                    'search_title'  '1':1 '149':4 '4':2 '9':3
                                   'search_artist'  'shining':1
                                  'search_release'  'grindstone':1
                                     'search_rest'  '00dwimp':1 '00metal':2 'black':5 'eid':3 'metal':4
                                    'search_combo'  '00dwimp':7 '00metal':8 '1':1A '149':4A '4':2A '9':3A 'black':11 'eid':9 'grindstone':6C 'metal':10 'shining':5B
                                    'tag_tracknum'  11
                                      'num_images'  0
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-4', 'Q-HAP-1', 'Q-PLAY-2', 'q-bass-3', 'q-grit-3']
                                      'lastfmtags'  ['suicidal black metal', 'swedish', 'black metal', 'experimental', 'depressive black metal']
                                        'tag_date'  2007
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620301790.535837  (2021-05-06 13:49:50)
                             'size'  8097792