======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '138'
                                          'artist'  'The Beatles'
                                     'text_people'  ''
                                         'release'  'The Beatles [white album]'
                                           'title'  'glass onion'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', '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-2']")
                                      'lastfmtags'  "['pop', 'rock', '60s', 'british', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '03'
                                      'tracktotal'  ''
                                            'date'  '1968'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '120.902'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Beatles [white album]'
'TBPM' (BPM (beats per minute))                     '120.902'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDRC' (Recording time)                             '1968'
'TIT2' (Title/songname/content description)         'glass onion'
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '138004'
'TPE1' (Lead performer(s)/Soloist(s))               'The Beatles'
'TPOS' (Part of a set)                              '1/2'
'TRCK' (Track number/Position in set)               '03'
'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'                                   ['pop', 'rock', '60s', 'british', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.27 dB'
'TXXX:replaygain_track_peak'                        '0.488864'

========================== row from database ==========================
                                              'id'  1525028
                                            'path'  /data/Music/Bulk/00poprockelectronic/Beatles/_68-the beatles (white album)/The Beatles - Glass Onion.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  138
                                           'genre'  rock-cppex-classic
                                        'filesize'  4417831
                                           'mtime'  1636039077
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic _68 the beatles (white album) Glass Onion rock cppex classic
                                      'tag_artist'  The Beatles
                                     'tag_release'  The Beatles [white album]
                                       'tag_title'  glass onion
                                             'bpm'  120.902
                                    'search_title'  'glass':1 'onion':2
                                   'search_artist'  'beatles':2 'the':1
                                  'search_release'  'album':5,6 'beatles':2 'the':1 'white':3,4
                                     'search_rest'  '00poprockelectronic':1 '68':2 'album':7,8 'beatles':4 'classic':13 'cppex':12 'glass':9 'onion':10 'rock':11 'the':3 'white':5,6
                                    'search_combo'  '00poprockelectronic':11 '68':12 'album':9C,10C,17,18 'beatles':4B,6C,14 'classic':23 'cppex':22 'glass':1A,19 'onion':2A,20 'rock':21 'the':3B,5C,13 'white':7C,8C,15,16
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-2']
                                      'lastfmtags'  ['pop', 'rock', '60s', 'british', 'classic rock']
                                        'tag_date'  1968
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636039077.3315232  (2021-11-04 16:17:57)
                             'size'  4417831