======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '153'
                                          'artist'  'Boyd Bachman'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Onder De Groene Palmen (vocal - Peter)'
                                           '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-2', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1942'
                                        'comments'  ''
                                           'genre'  'loc-eur-netherlands;prerock-vocal'
                                             'bpm'  '104.714'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '104.714'
'TCON' (Content type, a.k.a. Genre)                 ['loc-eur-netherlands', 'prerock-vocal']
'TDRC' (Recording time)                             '1942'
'TIT2' (Title/songname/content description)         'Onder De Groene Palmen (vocal - Peter)'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Boyd Bachman'
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+1.75 dB'
'TXXX:replaygain_track_peak'                        '0.395063'

========================== row from database ==========================
                                              'id'  1447857
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1942/Boyd Bachman - Onder De Groene Palmen (vocal - Peter) 1942.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  153
                                           'genre'  loc-eur-netherlands;prerock-vocal
                                        'filesize'  3073698
                                           'mtime'  1621627544
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1942 1942 loc eur netherlands;prerock
                                      'tag_artist'  Boyd Bachman
                                     'tag_release'  None
                                       'tag_title'  Onder De Groene Palmen (vocal - Peter)
                                             'bpm'  104.714
                                    'search_title'  'de':2 'groene':3 'onder':1 'palmen':4 'peter':7,8 'vocal':5,6
                                   'search_artist'  'bachman':2 'boyd':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1942':6 'country':4 'eur':8 'exotica':2 'jazz':1 'loc':7 'netherlands':9,11 'oldies':3 'prerock':10,12
                                    'search_combo'  '00oldiepop':15 '1942':16 'bachman':10B 'boyd':9B 'country':14 'de':2A 'eur':18 'exotica':12 'groene':3A 'jazz':11 'loc':17 'netherlands':19,21 'oldies':13 'onder':1A 'palmen':4A 'peter':7A,8A 'prerock':20,22 'vocal':5A,6A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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'  []
                                        'tag_date'  1942
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627543.5852938  (2021-05-21 22:05:43)
                             'size'  3073698