======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '262'
                                          'artist'  'Queen'
                                     'text_people'  ''
                                         'release'  'Greatest Hits'
                                           'title'  'I Want to Break Free'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['80s', 'glam rock', 'rock', 'hard rock', 'classic rock']"
                                     'discogstags'  "['rock', 'pop rock', 'glam']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '17'
                                      'tracktotal'  ''
                                            'date'  '1974'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '109.055'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Greatest Hits'
'TBPM' (BPM (beats per minute))                     '109.055'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDRC' (Recording time)                             '1974'
'TIT2' (Title/songname/content description)         'I Want to Break Free'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Queen'
'TRCK' (Track number/Position in set)               '17'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'pop rock', 'glam']
'TXXX:lastfmtags'                                   ['80s', 'glam rock', 'rock', 'hard rock', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'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'                        '0.603487'

========================== row from database ==========================
                                              'id'  1414814
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Queen/Queen_Greatest Hits_I Want To Break Free_17.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  262
                                           'genre'  rock-cppex-classic
                                        'filesize'  4206353
                                           'mtime'  1636038820
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy Queen_Greatest Hits_I To Free_17 rock cppex classic
                                      'tag_artist'  Queen
                                     'tag_release'  Greatest Hits
                                       'tag_title'  I Want to Break Free
                                             'bpm'  109.055
                                    'search_title'  'break':4 'free':5 'i':1 'to':3 'want':2
                                   'search_artist'  'queen':1
                                  'search_release'  'greatest':1 'hits':2
                                     'search_rest'  '17':8 'classic':11 'classicprogpsy':1 'cppex':10 'free':7 'greatest':3 'hits':4 'i':5 'queen':2 'rock':9 'to':6
                                    'search_combo'  '17':16 'break':4A 'classic':19 'classicprogpsy':9 'cppex':18 'free':5A,15 'greatest':7C,11 'hits':8C,12 'i':1A,13 'queen':6B,10 'rock':17 'to':3A,14 'want':2A
                                    'tag_tracknum'  17
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'glam rock', 'rock', 'hard rock', 'classic rock']
                                        'tag_date'  1974
                                     'discogstags'  ['rock', 'pop rock', 'glam']

============================== file details ==============================
                                           'mtime'  1636038819.7707913  (2021-11-04 16:13:39)
                             'size'  4206353