======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '299'
                                          'artist'  'Anathema'
                                     'text_people'  ''
                                         'release'  'A Natural Disaster'
                                           'title'  'Are You There-'
                                           '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-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['progressive rock', 'metal', 'atmospheric', 'doom metal', 'progressive "
 "metal']")
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '2003'
                                        'comments'  ''
                                           'genre'  'rock-cppex-progressive'
                                             'bpm'  '141.118'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

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'TALB' (Album/Movie/Show title)                     'A Natural Disaster'
'TBPM' (BPM (beats per minute))                     '141.118'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-progressive'
'TDRC' (Recording time)                             '2003'
'TIT2' (Title/songname/content description)         'Are You There-'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Anathema'
'TPUB' (Publisher)                                  'Koch'
'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'
'TXXX:lastfmtags'                                   ['progressive rock', 'metal', 'atmospheric', 'doom metal', 'progressive metal']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'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'                        '-0.80 dB'
'TXXX:replaygain_track_peak'                        '0.713080'

========================== row from database ==========================
                                              'id'  1416696
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Anathema/A Natural Disaster/anathema - (04) are you there-.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  299
                                           'genre'  rock-cppex-progressive
                                        'filesize'  7181354
                                           'mtime'  1620736051
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy anathema (04) are you there rock cppex progressive
                                      'tag_artist'  Anathema
                                     'tag_release'  A Natural Disaster
                                       'tag_title'  Are You There-
                                             'bpm'  141.118
                                    'search_title'  'are':1 'there':3,4 'you':2
                                   'search_artist'  'anathema':1
                                  'search_release'  'a':1 'disaster':3 'natural':2
                                     'search_rest'  '04':3,4 'anathema':2 'are':5 'classicprogpsy':1 'cppex':9 'progressive':10 'rock':8 'there':7 'you':6
                                    'search_combo'  '04':11,12 'a':6C 'anathema':5B,10 'are':1A,13 'classicprogpsy':9 'cppex':17 'disaster':8C 'natural':7C 'progressive':18 'rock':16 'there':3A,4A,15 'you':2A,14
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-3', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['progressive rock', 'metal', 'atmospheric', 'doom metal', 'progressive metal']
                                        'tag_date'  2003
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620736050.7739117  (2021-05-11 14:27:30)
                             'size'  7181354