======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '159'
                                          'artist'  'Louis Davids'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  'Wordt Nooit Verliefd'
                                           '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-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['kleinkunst', 'nederlandstalig', 'nederlands', 'the netherlands', 'dutch']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1920'
                                        'comments'  ''
                                           'genre'  'loc-eur-netherlands'
                                             'bpm'  '112.758'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '112.758'
'TCON' (Content type, a.k.a. Genre)                 'loc-eur-netherlands'
'TDRC' (Recording time)                             '1920'
'TIT2' (Title/songname/content description)         'Wordt Nooit Verliefd'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Louis Davids'
'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'                                   ['kleinkunst', 'nederlandstalig', 'nederlands', 'the netherlands', 'dutch']
'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'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.21 dB'
'TXXX:replaygain_track_peak'                        '0.551134'

========================== row from database ==========================
                                              'id'  1427869
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920/Louis Davids - Wordt Nooit Verliefd -6-1920.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  159
                                           'genre'  loc-eur-netherlands
                                        'filesize'  3200825
                                           'mtime'  1621627106
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920 6 1920 loc eur netherlands
                                      'tag_artist'  Louis Davids
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  Wordt Nooit Verliefd
                                             'bpm'  112.758
                                    'search_title'  'nooit':2 'verliefd':3 'wordt':1
                                   'search_artist'  'davids':2 'louis':1
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '00oldiepop':5 '1920':6 '6':7 'country':4 'eur':9 'exotica':2 'jazz':1 'loc':8 'netherlands':10 'oldies':3
                                    'search_combo'  '00oldiepop':15 '1920':16 '6':17 'album':7C 'country':14 'davids':5B 'eur':19 'exotica':12 'jazz':11 'loc':18 'louis':4B 'netherlands':20 'non':6C 'nonalbum':8C 'nooit':2A 'oldies':13 'tracks':9C,10C 'verliefd':3A 'wordt':1A
                                    '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-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['kleinkunst', 'nederlandstalig', 'nederlands', 'the netherlands', 'dutch']
                                        'tag_date'  1920
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627105.5644908  (2021-05-21 21:58:25)
                             'size'  3200825