======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '194'
                                          'artist'  'Slayer'
                                     'text_people'  ''
                                         'release'  'South Of Heaven'
                                           'title'  'Behind The Crooked Cross'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-4', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['thrash', 'speed metal', 'thrash metal', 'metal', 'heavy metal']"
                                     'discogstags'  "['rock', 'thrash']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '1988'
                                        'comments'  ''
                                           'genre'  'eid-metal-trash'
                                             'bpm'  '141.512'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'South Of Heaven'
'TBPM' (BPM (beats per minute))                     '141.512'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-trash'
'TDRC' (Recording time)                             '1988'
'TIT2' (Title/songname/content description)         'Behind The Crooked Cross'
'TKEY' (Initial key)                                '3A'
'TMED' (Media type)                                 'DIG'
'TPE1' (Lead performer(s)/Soloist(s))               'Slayer'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['rock', 'thrash']
'TXXX:lastfmtags'                                   ['thrash', 'speed metal', 'thrash metal', 'metal', 'heavy metal']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.30 dB'
'TXXX:replaygain_track_peak'                        '0.393474'

========================== row from database ==========================
                                              'id'  1305465
                                            'path'  /data/Music/Bulk/00poprockelectronic/Slayer/South of Heaven/Slayer - Behind the Crooked Cross - 04.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  194
                                           'genre'  eid-metal-trash
                                        'filesize'  3117795
                                           'mtime'  1620311757
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic of the 04 eid metal trash
                                      'tag_artist'  Slayer
                                     'tag_release'  South Of Heaven
                                       'tag_title'  Behind The Crooked Cross
                                             'bpm'  141.512
                                    'search_title'  'behind':1 'crooked':3 'cross':4 'the':2
                                   'search_artist'  'slayer':1
                                  'search_release'  'heaven':3 'of':2 'south':1
                                     'search_rest'  '00poprockelectronic':1 'eid':4 'metal':5 'of':2 'the':3 'trash':6
                                    'search_combo'  '00poprockelectronic':9 'behind':1A 'crooked':3A 'cross':4A 'eid':12 'heaven':8C 'metal':13 'of':7C,10 'slayer':5B 'south':6C 'the':2A,11 'trash':14
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-1', 'q-bass-2', 'q-grit-4']
                                      'lastfmtags'  ['thrash', 'speed metal', 'thrash metal', 'metal', 'heavy metal']
                                        'tag_date'  1988
                                     'discogstags'  ['rock', 'thrash']

============================== file details ==============================
                                           'mtime'  1620311757.0644693  (2021-05-06 16:35:57)
                             'size'  3117795