======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '184'
                                          'artist'  'Jimmie Lunceford & His Orchestra'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  '237 Back door stuff - Jimmie Lunceford & His Orchestra (15-04-1944)'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['swing', 'jazz', 'big band', 'saxophone', 'blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '237'
                                      'tracktotal'  ''
                                            'date'  '1944'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '96.026'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '96.026'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1944'
'TIT2' (Title/songname/content description)         '237 Back door stuff - Jimmie Lunceford & His Orchestra (15-04-1944)'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Jimmie Lunceford & His Orchestra'
'TRCK' (Track number/Position in set)               '237'
'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:lastfmtags'                                   ['swing', 'jazz', 'big band', 'saxophone', 'blues']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'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'                        '+1.05 dB'
'TXXX:replaygain_track_peak'                        '0.419346'

========================== row from database ==========================
                                              'id'  1455585
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1943/237 Back door stuff - Jimmie Lunceford & His Orchestra (15-04-1944).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  184
                                           'genre'  prerock-swing
                                        'filesize'  2958338
                                           'mtime'  1620561860
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1943 prerock swing
                                      'tag_artist'  Jimmie Lunceford & His Orchestra
                                     'tag_release'  None
                                       'tag_title'  237 Back door stuff - Jimmie Lunceford & His Orchestra (15-04-1944)
                                             'bpm'  96.026
                                    'search_title'  '04':10 '15':9 '15041944':12 '1944':11 '237':1 'back':2 'door':3 'his':7 'jimmie':5 'lunceford':6 'orchestra':8 'stuff':4
                                   'search_artist'  'his':3 'jimmie':1 'lunceford':2 'orchestra':4
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1943':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':7 'swing':8
                                    'search_combo'  '00oldiepop':21 '04':10A '15':9A '15041944':12A '1943':22 '1944':11A '237':1A 'back':2A 'country':20 'door':3A 'exotica':18 'his':7A,15B 'jazz':17 'jimmie':5A,13B 'lunceford':6A,14B 'oldies':19 'orchestra':8A,16B 'prerock':23 'stuff':4A 'swing':24
                                    'tag_tracknum'  237
                                      'num_images'  0
                                             'key'  6A
                                           '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-2', 'q-drums-3', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['swing', 'jazz', 'big band', 'saxophone', 'blues']
                                        'tag_date'  1944
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561859.8493495  (2021-05-09 14:04:19)
                             'size'  2958338