======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '175'
                                          'artist'  'Bert van Dongen'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Plekje Bij De Molen (Daar Bij Die Molen)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                     'discogstags'  "['folk, world, & country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'loc-eur-netherlands;prerock-vocal'
                                             'bpm'  '136.092'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '136.092'
'TCON' (Content type, a.k.a. Genre)                 ['loc-eur-netherlands', 'prerock-vocal']
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         'Plekje Bij De Molen (Daar Bij Die Molen)'
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'Bert van Dongen'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'folk, world, & country'
'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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.10 dB'
'TXXX:replaygain_track_peak'                        '0.462840'

========================== row from database ==========================
                                              'id'  1438440
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1935/Bert van Dongen - Plekje Bij De Molen (Daar Bij Die Molen) 1935.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  175
                                           'genre'  loc-eur-netherlands;prerock-vocal
                                        'filesize'  3516210
                                           'mtime'  1621627232
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1935 1935 loc eur netherlands;prerock vocal
                                      'tag_artist'  Bert van Dongen
                                     'tag_release'  None
                                       'tag_title'  Plekje Bij De Molen (Daar Bij Die Molen)
                                             'bpm'  136.092
                                    'search_title'  'bij':2 'daar':5,6 'de':3 'die':7 'molen':4,8 'plekje':1
                                   'search_artist'  'bert':1 'dongen':3 'van':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1935':6 'country':4 'eur':8 'exotica':2 'jazz':1 'loc':7 'netherlands':9,11 'oldies':3 'prerock':10,12 'vocal':13
                                    'search_combo'  '00oldiepop':16 '1935':17 'bert':9B 'bij':2A 'country':15 'daar':5A,6A 'de':3A 'die':7A 'dongen':11B 'eur':19 'exotica':13 'jazz':12 'loc':18 'molen':4A,8A 'netherlands':20,22 'oldies':14 'plekje':1A 'prerock':21,23 'van':10B 'vocal':24
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1935
                                     'discogstags'  ['folk, world, & country']

============================== file details ==============================
                                           'mtime'  1621627231.5121095  (2021-05-21 22:00:31)
                             'size'  3516210