======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '159'
                                          'artist'  'Olga Lowina'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Schoon Zwitserland (+ Jan Tromp)'
                                           '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-4', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['scrobbled from shellac']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1950'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted;loc-eur-netherlands'
                                             'bpm'  '142.608'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '142.608'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-unsorted', 'loc-eur-netherlands']
'TDRC' (Recording time)                             '1950'
'TIT2' (Title/songname/content description)         'Schoon Zwitserland (+ Jan Tromp)'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'Olga Lowina'
'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:lastfmtags'                                   'scrobbled from shellac'
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.46 dB'
'TXXX:replaygain_track_peak'                        '0.468106'

========================== row from database ==========================
                                              'id'  1442496
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1950/Olga Lowina - Schoon Zwitserland (+ Jan Tromp) 1950.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  159
                                           'genre'  prerock-unsorted;loc-eur-netherlands
                                        'filesize'  3192759
                                           'mtime'  1621627708
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1950 1950 prerock unsorted;loc eur netherlands
                                      'tag_artist'  Olga Lowina
                                     'tag_release'  None
                                       'tag_title'  Schoon Zwitserland (+ Jan Tromp)
                                             'bpm'  142.608
                                    'search_title'  'jan':3 'schoon':1 'tromp':4,5 'zwitserland':2
                                   'search_artist'  'lowina':2 'olga':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1950':6 'country':4 'eur':12 'exotica':2 'jazz':1 'loc':9,11 'netherlands':13 'oldies':3 'prerock':7 'unsorted':8,10
                                    'search_combo'  '00oldiepop':12 '1950':13 'country':11 'eur':19 'exotica':9 'jan':3A 'jazz':8 'loc':16,18 'lowina':7B 'netherlands':20 'oldies':10 'olga':6B 'prerock':14 'schoon':1A 'tromp':4A,5A 'unsorted':15,17 'zwitserland':2A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  11B
                                           '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-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['scrobbled from shellac']
                                        'tag_date'  1950
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627707.5757997  (2021-05-21 22:08:27)
                             'size'  3192759