======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '155'
                                          'artist'  'Boudewijn De Groot'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Een Slag Zo Zwaar Verloren'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-UNU-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'Q-PIANO-3', 'q-chart-3', 'q-drums-1', 'q-other-2', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['nederlandstalig', 'singer songwriter', 'kleinkunst', 'folk', 'dutch']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1996'
                                        'comments'  ''
                                           'genre'  'loc-eur-netherlands'
                                             'bpm'  '139.658'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '139.658'
'TCON' (Content type, a.k.a. Genre)                 'loc-eur-netherlands'
'TDRC' (Recording time)                             '1996'
'TIT2' (Title/songname/content description)         'Een Slag Zo Zwaar Verloren'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Boudewijn De Groot'
'TXXX:Mp3gain_minmax'                               '139,196'
'TXXX:Mp3gain_undo'                                 '+003,+003,N'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['nederlandstalig', 'singer songwriter', 'kleinkunst', 'folk', 'dutch']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.68 dB'
'TXXX:replaygain_track_peak'                        '0.615129'

========================== row from database ==========================
                                              'id'  932824
                                            'path'  /data/Music/Bulk/00localcharacter/00mid-north-europe/00dutch/Boudewijn de Groot/Wonderkind Aan Het Strand/Boudewijn De Groot - Een Slag Zo Zwaar Verloren.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  155
                                           'genre'  loc-eur-netherlands
                                        'filesize'  2494323
                                           'mtime'  1621629246
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00mid north europe 00dutch Wonderkind Aan Het Strand loc eur netherlands
                                      'tag_artist'  Boudewijn De Groot
                                     'tag_release'  None
                                       'tag_title'  Een Slag Zo Zwaar Verloren
                                             'bpm'  139.658
                                    'search_title'  'een':1 'slag':2 'verloren':5 'zo':3 'zwaar':4
                                   'search_artist'  'boudewijn':1 'de':2 'groot':3
                                  'search_release'  
                                     'search_rest'  '00dutch':4 '00mid':1 'aan':6 'eur':10 'europe':3 'het':7 'loc':9 'netherlands':11 'north':2 'strand':8 'wonderkind':5
                                    'search_combo'  '00dutch':12 '00mid':9 'aan':14 'boudewijn':6B 'de':7B 'een':1A 'eur':18 'europe':11 'groot':8B 'het':15 'loc':17 'netherlands':19 'north':10 'slag':2A 'strand':16 'verloren':5A 'wonderkind':13 'zo':3A 'zwaar':4A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-mixbeat-1', 'Q-PIANO-3', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-3', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['nederlandstalig', 'singer songwriter', 'kleinkunst', 'folk', 'dutch']
                                        'tag_date'  1996
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621629245.8363163  (2021-05-21 22:34:05)
                             'size'  2494323