======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '103'
                                          'artist'  'Peter Pan Speedrock'
                                     'text_people'  ''
                                         'release'  'Lucky Bastards'
                                           'title'  'Back In The City'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-OLDST-3', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-JZFKS-1', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['rock n roll', 'rock', 'hard rock', 'dutch', 'speedrock']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '2003'
                                        'comments'  ''
                                           'genre'  'rock-gr-speed'
                                             'bpm'  '131.755'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'PRIV:AverageLevel:Î)\x00\x00'                      PRIV(owner='AverageLevel', data=b'\xce)\x00\x00')
'PRIV:PeakValue:þ\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xfe\x7f\x00\x00')
'PRIV:WM/MediaClassPrimaryID:¼}`Ñ#ãâK\x86¡H¤*(D\x1e'  PRIV(owner='WM/MediaClassPrimaryID', data=b'\xbc}`\xd1#\xe3\xe2K\x86\xa1H\xa4*(D\x1e')
'PRIV:WM/MediaClassSecondaryID:\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'  PRIV(owner='WM/MediaClassSecondaryID', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
'TALB' (Album/Movie/Show title)                     'Lucky Bastards'
'TBPM' (BPM (beats per minute))                     '131.755'
'TCON' (Content type, a.k.a. Genre)                 'rock-gr-speed'
'TDRC' (Recording time)                             '2003'
'TIT2' (Title/songname/content description)         'Back In The City'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Peter Pan Speedrock'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['rock n roll', 'rock', 'hard rock', 'dutch', 'speedrock']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'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'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.34 dB'
'TXXX:replaygain_track_peak'                        '0.332483'

========================== row from database ==========================
                                              'id'  1491488
                                            'path'  /data/Music/Bulk/00localcharacter/00mid-north-europe/00dutch/Lucky Bastards/04-Back_In_The_City.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  103
                                           'genre'  rock-gr-speed
                                        'filesize'  2487619
                                           'mtime'  1636917479
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00mid north europe 00dutch 04 Back_In_The_City gr speed
                                      'tag_artist'  Peter Pan Speedrock
                                     'tag_release'  Lucky Bastards
                                       'tag_title'  Back In The City
                                             'bpm'  131.755
                                    'search_title'  'back':1 'city':4 'in':2 'the':3
                                   'search_artist'  'pan':2 'peter':1 'speedrock':3
                                  'search_release'  'bastards':2 'lucky':1
                                     'search_rest'  '00dutch':4 '00mid':1 'back':5 'city':8 'europe':3 'gr':9 'in':6 'north':2 'speed':10 'the':7
                                    'search_combo'  '00dutch':13 '00mid':10 'back':1A,14 'bastards':9C 'city':4A,17 'europe':12 'gr':18 'in':2A,15 'lucky':8C 'north':11 'pan':6B 'peter':5B 'speed':19 'speedrock':7B 'the':3A,16
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-2', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['rock n roll', 'rock', 'hard rock', 'dutch', 'speedrock']
                                        'tag_date'  2003
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1636917479.4687798  (2021-11-14 20:17:59)
                             'size'  2487619