======================== unified (from filesystem) ========================
                                         'bitrate'  '180.195'
                                        'duration'  '286'
                                          'artist'  'Eagles'
                                     'text_people'  ''
                                         'release'  'The Best Of'
                                           'title'  'Take It To The Limit'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['country', 'soft rock', 'rock', '70s', 'classic rock']"
                                     'discogstags'  "['soft rock', 'country rock', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  ''
                                            'date'  '1985'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '92.857'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Best Of'
'TBPM' (BPM (beats per minute))                     '92.857'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDRC' (Recording time)                             '1985'
'TIT2' (Title/songname/content description)         'Take It To The Limit'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'Eagles'
'TRCK' (Track number/Position in set)               '8'
'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'                                  ['soft rock', 'country rock', 'rock']
'TXXX:lastfmtags'                                   ['country', 'soft rock', 'rock', '70s', 'classic rock']
'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'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.75 dB'
'TXXX:replaygain_track_peak'                        '0.502370'

========================== row from database ==========================
                                              'id'  1410536
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Eagles - The Best Of/08 - Take It To The Limit.mp3
                                         'working'  None
                                         'bitrate'  180
                                    'duration_sec'  286
                                           'genre'  rock-cppex-classic
                                        'filesize'  6466663
                                           'mtime'  1636038710
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy 08 rock cppex classic
                                      'tag_artist'  Eagles
                                     'tag_release'  The Best Of
                                       'tag_title'  Take It To The Limit
                                             'bpm'  92.857
                                    'search_title'  'it':2 'limit':5 'take':1 'the':4 'to':3
                                   'search_artist'  'eagles':1
                                  'search_release'  'best':2 'of':3 'the':1
                                     'search_rest'  'classic':4 'classicprogpsy':1 'cppex':3 'rock':2
                                    'search_combo'  'best':8C 'classic':13 'classicprogpsy':10 'cppex':12 'eagles':6B 'it':2A 'limit':5A 'of':9C 'rock':11 'take':1A 'the':4A,7C 'to':3A
                                    'tag_tracknum'  8
                                      'num_images'  0
                                             'key'  1B
                                           '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-4', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['country', 'soft rock', 'rock', '70s', 'classic rock']
                                        'tag_date'  1985
                                     'discogstags'  ['soft rock', 'country rock', 'rock']

============================== file details ==============================
                                           'mtime'  1636038710.1998727  (2021-11-04 16:11:50)
                             'size'  6466663