======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '420'
                                          'artist'  'Jethro Tull'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  ' Rock Island'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-3', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['folk rock', 'rock', 'progressive rock', 'progressive', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '05'
                                      'tracktotal'  ''
                                            'date'  '1989'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic;rock-cppex-progressive'
                                             'bpm'  '143.925'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '143.925'
'TCON' (Content type, a.k.a. Genre)                 ['rock-cppex-classic', 'rock-cppex-progressive']
'TDRC' (Recording time)                             '1989'
'TIT2' (Title/songname/content description)         ' Rock Island'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Jethro Tull'
'TRCK' (Track number/Position in set)               '05'
'TXXX:Mp3gain_minmax'                               '104,187'
'TXXX:Mp3gain_undo'                                 '+002,+002,N'
'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:lastfmtags'                                   ['folk rock', 'rock', 'progressive rock', 'progressive', 'classic rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+1.11 dB'
'TXXX:replaygain_track_peak'                        '0.662624'

========================== row from database ==========================
                                              'id'  1344474
                                            'path'  /data/Music/Bulk/00poprockelectronic/Jethro Tull/Jethro Tull - 1989 - Tales From The Crystal Flute (Live)/05 - Jethro Tull - Rock Island.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  420
                                           'genre'  rock-cppex-classic;rock-cppex-progressive
                                        'filesize'  6728198
                                           'mtime'  1636039276
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 1989 Tales From The Crystal Flute (Live) 05 rock cppex classic;rock cppex progressive
                                      'tag_artist'  Jethro Tull
                                     'tag_release'  None
                                       'tag_title'   Rock Island
                                             'bpm'  143.925
                                    'search_title'  'island':2 'rock':1
                                   'search_artist'  'jethro':1 'tull':2
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 '1989':2 'classic':12,14 'cppex':11 'crystal':6 'flute':7 'from':4 'live':8,9 'progressive':16 'rock':10,13,15 'tales':3 'the':5
                                    'search_combo'  '00poprockelectronic':5 '1989':6 'classic':16,18 'cppex':15 'crystal':10 'flute':11 'from':8 'island':2A 'jethro':3B 'live':12,13 'progressive':20 'rock':1A,14,17,19 'tales':7 'the':9 'tull':4B
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', '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-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-3']
                                      'lastfmtags'  ['folk rock', 'rock', 'progressive rock', 'progressive', 'classic rock']
                                        'tag_date'  1989
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636039275.584379  (2021-11-04 16:21:15)
                             'size'  6728198