======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '180'
                                          'artist'  'Deben Bhattacharya'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'V lete'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-3', 'Q-LOCALNESS-4', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-1', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['traditional', 'ethnic', 'world music', 'folk', 'ethnomusicologist']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  'B5'
                                      'tracktotal'  ''
                                            'date'  '1972'
                                        'comments'  ''
                                           'genre'  'loc-unsorted'
                                             'bpm'  '131.243'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'PRIV:AverageLevel:{\r\x00\x00'                     PRIV(owner='AverageLevel', data=b'{\r\x00\x00')
'PRIV:PeakValue:¡d\x00\x00'                         PRIV(owner='PeakValue', data=b'\xa1d\x00\x00')
'TBPM' (BPM (beats per minute))                     '131.243'
'TCON' (Content type, a.k.a. Genre)                 'loc-unsorted'
'TDRC' (Recording time)                             '1972'
'TIT2' (Title/songname/content description)         'V lete'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Deben Bhattacharya'
'TRCK' (Track number/Position in set)               'B5'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '4'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '3'
'TXXX:lastfmtags'                                   ['traditional', 'ethnic', 'world music', 'folk', 'ethnomusicologist']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.70 dB'
'TXXX:replaygain_track_peak'                        '0.466442'

========================== row from database ==========================
                                              'id'  1239249
                                            'path'  /data/Music/Bulk/00localcharacter/00south-europe-middle-east/Deben Bhattacharya - Songs and Dances from Czechoslovakia (Argo ZFB 59, 1972)/B5 V lete.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  180
                                           'genre'  loc-unsorted
                                        'filesize'  7218070
                                           'mtime'  1621627078
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00south europe middle east Songs and Dances from Czechoslovakia (Argo ZFB 59, 1972) B5 loc unsorted
                                      'tag_artist'  Deben Bhattacharya
                                     'tag_release'  None
                                       'tag_title'  V lete
                                             'bpm'  131.243
                                    'search_title'  'lete':2 'v':1
                                   'search_artist'  'bhattacharya':2 'deben':1
                                  'search_release'  
                                     'search_rest'  '00south':1 '1972':15,16 '59':13,14 'and':6 'argo':10,11 'b5':17 'czechoslovakia':9 'dances':7 'east':4 'europe':2 'from':8 'loc':18 'middle':3 'songs':5 'unsorted':19 'zfb':12
                                    'search_combo'  '00south':5 '1972':19,20 '59':17,18 'and':10 'argo':14,15 'b5':21 'bhattacharya':4B 'czechoslovakia':13 'dances':11 'deben':3B 'east':8 'europe':6 'from':12 'lete':2A 'loc':22 'middle':7 'songs':9 'unsorted':23 'v':1A 'zfb':16
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-4', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-3', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['traditional', 'ethnic', 'world music', 'folk', 'ethnomusicologist']
                                        'tag_date'  1972
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627078.0201817  (2021-05-21 21:57:58)
                             'size'  7218070