======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '167'
                                          'artist'  'Maurice Winnick'
                                     'text_people'  ''
                                         'release'  'Decca F 6591'
                                           'title'  'Bei Mir Bist Du Schoen (vocal - Al Bowlly)'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  '[\'big band\', \'jazz\', "1920\'s", \'swing\']'
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1937'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '128.740'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Decca F 6591'
'TBPM' (BPM (beats per minute))                     '128.740'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1937'
'TIT2' (Title/songname/content description)         'Bei Mir Bist Du Schoen (vocal - Al Bowlly)'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Maurice Winnick'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['big band', 'jazz', "1920's", 'swing']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'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'                        '+1.63 dB'
'TXXX:replaygain_track_peak'                        '0.667810'

========================== row from database ==========================
                                              'id'  1440643
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1937/Maurice Winnick - Bei Mir Bist Du Schoen (vocal - Al Bowlly) 29-12-1937.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  167
                                           'genre'  prerock-band
                                        'filesize'  3356546
                                           'mtime'  1620560575
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1937 29 12 1937 prerock band
                                      'tag_artist'  Maurice Winnick
                                     'tag_release'  Decca F 6591
                                       'tag_title'  Bei Mir Bist Du Schoen (vocal - Al Bowlly)
                                             'bpm'  128.74
                                    'search_title'  'al':8 'bei':1 'bist':3 'bowlly':9,10 'du':4 'mir':2 'schoen':5 'vocal':6,7
                                   'search_artist'  'maurice':1 'winnick':2
                                  'search_release'  '6591':3 'decca':1 'f':2
                                     'search_rest'  '00oldiepop':5 '1937':6 '29':7 'band':9 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8
                                    'search_combo'  '00oldiepop':20 '1937':21 '29':22 '6591':15C 'al':8A 'band':24 'bei':1A 'bist':3A 'bowlly':9A,10A 'country':19 'decca':13C 'du':4A 'exotica':17 'f':14C 'jazz':16 'maurice':11B 'mir':2A 'oldies':18 'prerock':23 'schoen':5A 'vocal':6A,7A 'winnick':12B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', '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-1']
                                      'lastfmtags'  ['big band', 'jazz', "1920's", 'swing']
                                        'tag_date'  1937
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620560575.1887062  (2021-05-09 13:42:55)
                             'size'  3356546