======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '427'
                                          'artist'  'AC'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'dc - For Those About To Rock'
                                           'quals'  ("['Q-OLDST-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'q-syn-2', "
 "'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', 'q-drums-4', "
 "'q-other-3', 'q-piano-1', 'q-vocals-2', 'Q-HHRNBTT-1', 'q-mixbeat-2']")
                                      'lastfmtags'  "['ac/dc', 'hard rock', 'acdc', 'ac-dc', 'classic rock']"
                                     'discogstags'  "['grime', 'hip hop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2008'
                                        'comments'  ''
                                           'genre'  'rock-unsorted'
                                             'bpm'  '130.650'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '130.650'
'TCON' (Content type, a.k.a. Genre)                 'rock-unsorted'
'TDRC' (Recording time)                             '2008'
'TIT2' (Title/songname/content description)         'dc - For Those About To Rock'
'TKEY' (Initial key)                                '10A'
'TLEN' (Length)                                     '427781'
'TMED' (Media type)                                 'DIG'
'TPE1' (Lead performer(s)/Soloist(s))               'Ac'
'TPE2' (Band/orchestra/accompaniment)               'AC'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['grime', 'hip hop']
'TXXX:lastfmtags'                                   ['ac/dc', 'hard rock', 'acdc', 'ac-dc', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.47 dB'
'TXXX:replaygain_track_peak'                        '0.452325'

========================== row from database ==========================
                                              'id'  1351376
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/Ac - Dc - For Those About To Rock [].mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  427
                                           'genre'  rock-unsorted
                                        'filesize'  10268672
                                           'mtime'  1620392292
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] Ac Dc [] rock unsorted
                                      'tag_artist'  AC
                                     'tag_release'  None
                                       'tag_title'  dc - For Those About To Rock
                                             'bpm'  130.65
                                    'search_title'  'about':4 'dc':1 'for':2 'rock':6 'those':3 'to':5
                                   'search_artist'  'ac':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'ac':7 'dc':8 'files':5,6 'loose':3,4 'rock':9 'unsorted':2
                                    'search_combo'  '00poprockelectronic':8 'about':4A 'ac':7B,14 'dc':1A,15 'files':12,13 'for':2A 'loose':10,11 'rock':6A,16 'those':3A 'to':5A 'unsorted':9
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['ac/dc', 'hard rock', 'acdc', 'ac-dc', 'classic rock']
                                        'tag_date'  2008
                                     'discogstags'  ['grime', 'hip hop']

============================== file details ==============================
                                           'mtime'  1620392291.773065  (2021-05-07 14:58:11)
                             'size'  10268672