======================== unified (from filesystem) ========================
                                         'bitrate'  '207.87'
                                        'duration'  '365'
                                          'artist'  'Black Sabbath'
                                     'text_people'  ''
                                         'release'  'The Best Of... CD1'
                                           'title'  'N.I.B.'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['classic rock', 'rock', 'hard rock', 'metal', 'heavy metal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '03'
                                      'tracktotal'  '16'
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'eid-metal-heavy'
                                             'bpm'  '142.608'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Best Of... CD1'
'TBPM' (BPM (beats per minute))                     '142.608'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-heavy'
'TDRC' (Recording time)                             '2000'
'TENC' (Encoded by)                                 'Exact Audio Copy   (Secure mode)'
'TIT2' (Title/songname/content description)         'N.I.B.'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Black Sabbath'
'TRCK' (Track number/Position in set)               '03/16'
'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:lastfmtags'                                   ['classic rock', 'rock', 'hard rock', 'metal', 'heavy metal']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.56 dB'
'TXXX:replaygain_track_peak'                        '0.428393'

========================== row from database ==========================
                                              'id'  1391200
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Black Sabbath/The Best of Black Sabbath/disc1_103_-N.I.B..mp3
                                         'working'  None
                                         'bitrate'  207
                                    'duration_sec'  365
                                           'genre'  eid-metal-heavy
                                        'filesize'  9507324
                                           'mtime'  1620311069
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal of disc1_103_ eid metal heavy
                                      'tag_artist'  Black Sabbath
                                     'tag_release'  The Best Of... CD1
                                       'tag_title'  N.I.B.
                                             'bpm'  142.608
                                    'search_title'  'b':3 'i':2 'n':1 'nib':4
                                   'search_artist'  'black':1 'sabbath':2
                                  'search_release'  'best':2 'cd1':5 'of':3,4 'the':1
                                     'search_rest'  '00dwimp':1 '00metal':2 '103':5 'disc1':4 'eid':6 'heavy':8 'metal':7 'of':3
                                    'search_combo'  '00dwimp':12 '00metal':13 '103':16 'b':3A 'best':8C 'black':5B 'cd1':11C 'disc1':15 'eid':17 'heavy':19 'i':2A 'metal':18 'n':1A 'nib':4A 'of':9C,10C,14 'sabbath':6B 'the':7C
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-1', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['classic rock', 'rock', 'hard rock', 'metal', 'heavy metal']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620311068.604806  (2021-05-06 16:24:28)
                             'size'  9507324