======================== unified (from filesystem) ========================
                                         'bitrate'  '319.728'
                                        'duration'  '266'
                                          'artist'  'Queen'
                                     'text_people'  ''
                                         'release'  'Greatest Hits II'
                                           'title'  'A Kind of Magic'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-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-4', 'q-other-2', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['80s', 'glam rock', 'rock', 'hard rock', 'classic rock']"
                                     'discogstags'  "['electronic', 'rock', 'synth-pop', 'arena rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '1991'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '130.314'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Greatest Hits II'
'TBPM' (BPM (beats per minute))                     '130.314'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDRC' (Recording time)                             '1991'
'TIT2' (Title/songname/content description)         'A Kind of Magic'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'Queen'
'TRCK' (Track number/Position in set)               '1'
'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'                                  ['electronic', 'rock', 'synth-pop', 'arena rock']
'TXXX:lastfmtags'                                   ['80s', 'glam rock', 'rock', 'hard rock', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.02 dB'
'TXXX:replaygain_track_peak'                        '0.829347'

========================== row from database ==========================
                                              'id'  1413500
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Queen/Greatest Hits II/MBZ;#Queen;#Greatest Hits II;#01;#A Kind of Magic.mp3
                                         'working'  None
                                         'bitrate'  319
                                    'duration_sec'  266
                                           'genre'  rock-cppex-classic
                                        'filesize'  10638842
                                           'mtime'  1636038792
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy MBZ;#Queen;#Greatest II;#01;#A rock cppex classic
                                      'tag_artist'  Queen
                                     'tag_release'  Greatest Hits II
                                       'tag_title'  A Kind of Magic
                                             'bpm'  130.314
                                    'search_title'  'a':1 'kind':2 'magic':4 'of':3
                                   'search_artist'  'queen':1
                                  'search_release'  'greatest':1 'hits':2 'ii':3
                                     'search_rest'  '01':9,12 'a':10,13 'classic':16 'classicprogpsy':1 'cppex':15 'greatest':4,7 'ii':8,11 'mbz':2,5 'queen':3,6 'rock':14
                                    'search_combo'  '01':17,20 'a':1A,18,21 'classic':24 'classicprogpsy':9 'cppex':23 'greatest':6C,12,15 'hits':7C 'ii':8C,16,19 'kind':2A 'magic':4A 'mbz':10,13 'of':3A 'queen':5B,11,14 'rock':22
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'glam rock', 'rock', 'hard rock', 'classic rock']
                                        'tag_date'  1991
                                     'discogstags'  ['electronic', 'rock', 'synth-pop', 'arena rock']

============================== file details ==============================
                                           'mtime'  1636038792.4072428  (2021-11-04 16:13:12)
                             'size'  10638842