======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '124'
                                          'artist'  'Enoch Light'
                                     'text_people'  ''
                                         'release'  '20s and 30s popular'
                                           'title'  'Charleston'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['lounge', 'space age pop', 'exotica', 'illstreet', 'easy listening']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1925'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '113.836'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'PRIV:AverageLevel:L\x13\x00\x00'                   PRIV(owner='AverageLevel', data=b'L\x13\x00\x00')
'PRIV:PeakValue:\x99_\x00\x00'                      PRIV(owner='PeakValue', data=b'\x99_\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)                     '20s and 30s popular'
'TBPM' (BPM (beats per minute))                     '113.836'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1925'
'TIT2' (Title/songname/content description)         'Charleston'
'TKEY' (Initial key)                                '3A'
'TLEN' (Length)                                     '124588'
'TPE1' (Lead performer(s)/Soloist(s))               'Enoch Light'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['lounge', 'space age pop', 'exotica', 'illstreet', 'easy listening']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.97 dB'
'TXXX:replaygain_track_peak'                        '0.373438'

========================== row from database ==========================
                                              'id'  1156065
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Enoch Light - Charleston.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  124
                                           'genre'  prerock-unsorted
                                        'filesize'  1996131
                                           'mtime'  1621697856
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s prerock unsorted
                                      'tag_artist'  Enoch Light
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  Charleston
                                             'bpm'  113.836
                                    'search_title'  'charleston':1
                                   'search_artist'  'enoch':1 'light':2
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8 'unsorted':9
                                    'search_combo'  '00oldiepop':12 '1920s':13 '1930s':14 '20s':4C '30s':6C 'and':5C 'charleston':1A 'country':11 'enoch':2B 'exotica':9 'jazz':8 'light':3B 'oldies':10 'popular':7C 'prerock':15 'unsorted':16
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-3', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['lounge', 'space age pop', 'exotica', 'illstreet', 'easy listening']
                                        'tag_date'  1925
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621697855.6965063  (2021-05-22 17:37:35)
                             'size'  1996131