======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '184'
                                          'artist'  'Piet Muyselaar'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Aan De Oever Van De Rijn (+ Ramblers)'
                                           '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-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1938'
                                        'comments'  ''
                                           'genre'  'loc-eur-netherlands;prerock-vocal'
                                             'bpm'  '140.823'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '140.823'
'TCON' (Content type, a.k.a. Genre)                 ['loc-eur-netherlands', 'prerock-vocal']
'TDRC' (Recording time)                             '1938'
'TIT2' (Title/songname/content description)         'Aan De Oever Van De Rijn (+ Ramblers)'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Piet Muyselaar'
'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: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'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.60 dB'
'TXXX:replaygain_track_peak'                        '0.549483'

========================== row from database ==========================
                                              'id'  1427892
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1938/Piet Muyselaar - Aan De Oever Van De Rijn (+ Ramblers) 18-11-1938.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  184
                                           'genre'  loc-eur-netherlands;prerock-vocal
                                        'filesize'  3682098
                                           'mtime'  1621627418
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1938 18 11 1938 loc eur netherlands;prerock vocal
                                      'tag_artist'  Piet Muyselaar
                                     'tag_release'  None
                                       'tag_title'  Aan De Oever Van De Rijn (+ Ramblers)
                                             'bpm'  140.823
                                    'search_title'  'aan':1 'de':2 'oever':3 'ramblers':6,7 'rijn':5 'van':4
                                   'search_artist'  'muyselaar':2 'piet':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '18':7 '1938':6 'country':4 'eur':9 'exotica':2 'jazz':1 'loc':8 'netherlands':10,12 'oldies':3 'prerock':11,13 'vocal':14
                                    'search_combo'  '00oldiepop':14 '18':16 '1938':15 'aan':1A 'country':13 'de':2A 'eur':18 'exotica':11 'jazz':10 'loc':17 'muyselaar':9B 'netherlands':19,21 'oever':3A 'oldies':12 'piet':8B 'prerock':20,22 'ramblers':6A,7A 'rijn':5A 'van':4A 'vocal':23
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           '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-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1938
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627418.065837  (2021-05-21 22:03:38)
                             'size'  3682098