======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '169'
                                          'artist'  'J.J. Cale'
                                     'text_people'  ''
                                         'release'  'The Very Best Of'
                                           'title'  'City Girls'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-2', 'Q-JZFKS-3', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues rock', 'classic rock', 'blues', 'rock', 'singer songwriter']"
                                     'discogstags'  "['rock', 'blues rock', 'country rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '17'
                                      'tracktotal'  ''
                                            'date'  '1998'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '118.6'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'PRIV:AverageLevel:ö\x0b\x00\x00'                   PRIV(owner='AverageLevel', data=b'\xf6\x0b\x00\x00')
'PRIV:PeakValue:f|\x00\x00'                         PRIV(owner='PeakValue', data=b'f|\x00\x00')
'TALB' (Album/Movie/Show title)                     'The Very Best Of'
'TBPM' (BPM (beats per minute))                     '118.6'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TDRC' (Recording time)                             '1998'
'TIT2' (Title/songname/content description)         'City Girls'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'J.J. Cale'
'TRCK' (Track number/Position in set)               '17'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'blues rock', 'country rock']
'TXXX:lastfmtags'                                   ['blues rock', 'classic rock', 'blues', 'rock', 'singer songwriter']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'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'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.10 dB'
'TXXX:replaygain_track_peak'                        '0.971891'

========================== row from database ==========================
                                              'id'  1271445
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/J.J. Cale - JJ Cale/The Very Best Of/jj cale - the very best of - 17 - city girls.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  169
                                           'genre'  prerock-jb-blues
                                        'filesize'  5417401
                                           'mtime'  1620402317
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country JJ jj cale the very best of 17 city girls prerock jb blues
                                      'tag_artist'  J.J. Cale
                                     'tag_release'  The Very Best Of
                                       'tag_title'  City Girls
                                             'bpm'  118.6
                                    'search_title'  'city':1 'girls':2
                                   'search_artist'  'cale':4 'j':1,2 'jj':3
                                  'search_release'  'best':3 'of':4 'the':1 'very':2
                                     'search_rest'  'best':9 'blues':15 'cale':6 'city':11 'country':4 'exotica':2 'girls':12 'jazz':1 'jb':14 'jj':5 'of':10 'oldies':3 'prerock':13 'the':7 'very':8
                                    'search_combo'  'best':9C,19 'blues':25 'cale':6B,16 'city':1A,21 'country':14 'exotica':12 'girls':2A,22 'j':3B,4B 'jazz':11 'jb':24 'jj':5B,15 'of':10C,20 'oldies':13 'prerock':23 'the':7C,17 'very':8C,18
                                    'tag_tracknum'  17
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-3', 'q-syn-1', 'q-chart-3', 'q-other-3', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['blues rock', 'classic rock', 'blues', 'rock', 'singer songwriter']
                                        'tag_date'  1998
                                     'discogstags'  ['rock', 'blues rock', 'country rock']

============================== file details ==============================
                                           'mtime'  1620402317.000753  (2021-05-07 17:45:17)
                             'size'  5417401