======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '137'
                                          'artist'  'The Monkees'
                                     'text_people'  ''
                                         'release'  'Greatest Hits'
                                           'title'  'Mary, Mary'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['oldies', 'rock', 'pop', '60s', 'classic rock']"
                                     'discogstags'  "['rock', 'pop rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  '20'
                                            'date'  '1995'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '127.444'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Greatest Hits'
'TBPM' (BPM (beats per minute))                     '127.444'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDRC' (Recording time)                             '1995'
'TIT2' (Title/songname/content description)         'Mary, Mary'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Monkees'
'TRCK' (Track number/Position in set)               '6/20'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'pop rock']
'TXXX:lastfmtags'                                   ['oldies', 'rock', 'pop', '60s', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.94 dB'
'TXXX:replaygain_track_peak'                        '0.493163'

========================== row from database ==========================
                                              'id'  1410712
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/The Monkees/Greatest Hits/The Monkees - Mary, Mary - 06.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  137
                                           'genre'  rock-cppex-classic
                                        'filesize'  2194243
                                           'mtime'  1636038936
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy 06 rock cppex classic
                                      'tag_artist'  The Monkees
                                     'tag_release'  Greatest Hits
                                       'tag_title'  Mary, Mary
                                             'bpm'  127.444
                                    'search_title'  'mary':1,2
                                   'search_artist'  'monkees':2 'the':1
                                  'search_release'  'greatest':1 'hits':2
                                     'search_rest'  'classic':4 'classicprogpsy':1 'cppex':3 'rock':2
                                    'search_combo'  'classic':10 'classicprogpsy':7 'cppex':9 'greatest':5C 'hits':6C 'mary':1A,2A 'monkees':4B 'rock':8 'the':3B
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['oldies', 'rock', 'pop', '60s', 'classic rock']
                                        'tag_date'  1995
                                     'discogstags'  ['rock', 'pop rock']

============================== file details ==============================
                                           'mtime'  1636038935.6333165  (2021-11-04 16:15:35)
                             'size'  2194243