======================== unified (from filesystem) ========================
                                         'bitrate'  '245.842'
                                        'duration'  '376'
                                          'artist'  'Led Zeppelin'
                                     'text_people'  ''
                                         'release'  'Presence'
                                           'title'  "Nobody's Fault but Mine"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-3', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['hard rock', 'rock', 'progressive rock', '70s', 'classic rock']"
                                     'discogstags'  "['rock', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '1976'
                                        'comments'  ''
                                           'genre'  'rock-cppex-progressive'
                                             'bpm'  '130.988'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Presence'
'TBPM' (BPM (beats per minute))                     '130.988'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-progressive'
'TDRC' (Recording time)                             '1976'
'TIT2' (Title/songname/content description)         "Nobody's Fault but Mine"
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Led Zeppelin'
'TRCK' (Track number/Position in set)               '4'
'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', 'classic rock']
'TXXX:lastfmtags'                                   ['hard rock', 'rock', 'progressive rock', '70s', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.29 dB'
'TXXX:replaygain_track_peak'                        '0.449253'

========================== row from database ==========================
                                              'id'  1517076
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Led Zeppelin/MBZ;#Led Zeppelin;#Presence;#04;#Nobody_s Fault but Mine.mp3
                                         'working'  None
                                         'bitrate'  245
                                    'duration_sec'  376
                                           'genre'  rock-cppex-progressive
                                        'filesize'  11558540
                                           'mtime'  1620736238
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy MBZ;#Led Zeppelin;#Presence;#04;#Nobody_s rock cppex progressive
                                      'tag_artist'  Led Zeppelin
                                     'tag_release'  Presence
                                       'tag_title'  Nobody's Fault but Mine
                                             'bpm'  130.988
                                    'search_title'  'but':5 'fault':4 'mine':6 'nobody':1 'nobodys':3 's':2
                                   'search_artist'  'led':1 'zeppelin':2
                                  'search_release'  'presence':1
                                     'search_rest'  '04':8,13 'classicprogpsy':1 'cppex':17 'led':3,5 'mbz':2,4 'nobody':9,14 'presence':7,12 'progressive':18 'rock':16 's':10,15 'zeppelin':6,11
                                    'search_combo'  '04':17,22 'but':5A 'classicprogpsy':10 'cppex':26 'fault':4A 'led':7B,12,14 'mbz':11,13 'mine':6A 'nobody':1A,18,23 'nobodys':3A 'presence':9C,16,21 'progressive':27 'rock':25 's':2A,19,24 'zeppelin':8B,15,20
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-4', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-3']
                                      'lastfmtags'  ['hard rock', 'rock', 'progressive rock', '70s', 'classic rock']
                                        'tag_date'  1976
                                     'discogstags'  ['rock', 'classic rock']

============================== file details ==============================
                                           'mtime'  1620736237.7542896  (2021-05-11 14:30:37)
                             'size'  11558540