======================== unified (from filesystem) ========================
                                         'bitrate'  '210.288'
                                        'duration'  '239'
                                          'artist'  'Black Sabbath'
                                     'text_people'  ''
                                         'release'  'The Best Of ... CD2'
                                           'title'  'Hole In The Sky'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-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-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['classic rock', 'rock', 'hard rock', 'metal', 'heavy metal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '07'
                                      'tracktotal'  '16'
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'eid-metal-heavy'
                                             'bpm'  '117.877'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Best Of ... CD2'
'TBPM' (BPM (beats per minute))                     '117.877'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-heavy'
'TDRC' (Recording time)                             '2000'
'TENC' (Encoded by)                                 'Exact Audio Copy   (Secure mode)'
'TIT2' (Title/songname/content description)         'Hole In The Sky'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Black Sabbath'
'TRCK' (Track number/Position in set)               '07/16'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['classic rock', 'rock', 'hard rock', 'metal', 'heavy metal']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.49 dB'
'TXXX:replaygain_track_peak'                        '0.350665'

========================== row from database ==========================
                                              'id'  1393895
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Black Sabbath/The Best of Black Sabbath/Disc2_07_-Hole_In_The_Sky.mp3
                                         'working'  None
                                         'bitrate'  210
                                    'duration_sec'  239
                                           'genre'  eid-metal-heavy
                                        'filesize'  6308895
                                           'mtime'  1620311067
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal of Disc2_07_ Hole_In_The_Sky eid metal heavy
                                      'tag_artist'  Black Sabbath
                                     'tag_release'  The Best Of ... CD2
                                       'tag_title'  Hole In The Sky
                                             'bpm'  117.877
                                    'search_title'  'hole':1 'in':2 'sky':4 'the':3
                                   'search_artist'  'black':1 'sabbath':2
                                  'search_release'  'best':2 'cd2':4 'of':3 'the':1
                                     'search_rest'  '00dwimp':1 '00metal':2 '07':5 'disc2':4 'eid':10 'heavy':12 'hole':6 'in':7 'metal':11 'of':3 'sky':9 'the':8
                                    'search_combo'  '00dwimp':11 '00metal':12 '07':15 'best':8C 'black':5B 'cd2':10C 'disc2':14 'eid':20 'heavy':22 'hole':1A,16 'in':2A,17 'metal':21 'of':9C,13 'sabbath':6B 'sky':4A,19 'the':3A,7C,18
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-1', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['classic rock', 'rock', 'hard rock', 'metal', 'heavy metal']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620311067.390059  (2021-05-06 16:24:27)
                             'size'  6308895