======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '213'
                                          'artist'  'Heinz Wehner Orchester'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Aunt Hagar's Blues"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1938'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '87.182'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '87.182'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1938'
'TIT2' (Title/songname/content description)         "Aunt Hagar's Blues"
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Heinz Wehner Orchester'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'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'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.45 dB'
'TXXX:replaygain_track_peak'                        '0.558198'

========================== row from database ==========================
                                              'id'  1505562
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1938/Heinz Wehner Orchester - Aunt Hagar_s Blues 2-9-1938.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  213
                                           'genre'  prerock-band
                                        'filesize'  4273970
                                           'mtime'  1620560647
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1938 Hagar_s 2 9 1938 prerock band
                                      'tag_artist'  Heinz Wehner Orchester
                                     'tag_release'  None
                                       'tag_title'  Aunt Hagar's Blues
                                             'bpm'  87.182
                                    'search_title'  'aunt':1 'blues':5 'hagar':2 'hagars':4 's':3
                                   'search_artist'  'heinz':1 'orchester':3 'wehner':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1938':6 '2':9 '9':10 'band':12 'country':4 'exotica':2 'hagar':7 'jazz':1 'oldies':3 'prerock':11 's':8
                                    'search_combo'  '00oldiepop':13 '1938':14 '2':17 '9':18 'aunt':1A 'band':20 'blues':5A 'country':12 'exotica':10 'hagar':2A,15 'hagars':4A 'heinz':6B 'jazz':9 'oldies':11 'orchester':8B 'prerock':19 's':3A,16 'wehner':7B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1938
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620560646.9671876  (2021-05-09 13:44:06)
                             'size'  4273970