======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '178'
                                          'artist'  'Vaughn Monroe His Orchestra & Four Lee Sisters'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  ("042 Let's get lost - Vaughn Monroe His Orchestra & Four Lee Sisters "
 '(8-05-1943)')
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '42'
                                      'tracktotal'  ''
                                            'date'  '1943'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '90.250'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '90.250'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1943'
'TIT2' (Title/songname/content description)         ("042 Let's get lost - Vaughn Monroe His Orchestra & Four Lee Sisters "
 '(8-05-1943)')
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Vaughn Monroe His Orchestra & Four Lee Sisters'
'TRCK' (Track number/Position in set)               '42'
'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'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.13 dB'
'TXXX:replaygain_track_peak'                        '0.367008'

========================== row from database ==========================
                                              'id'  1508927
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1943/042 Let_s get lost - Vaughn Monroe His Orchestra & Four Lee Sisters (8-05-1943).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  178
                                           'genre'  prerock-swing
                                        'filesize'  2855938
                                           'mtime'  1620561810
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop Let_s prerock swing
                                      'tag_artist'  Vaughn Monroe His Orchestra & Four Lee Sisters
                                     'tag_release'  None
                                       'tag_title'  042 Let's get lost - Vaughn Monroe His Orchestra & Four Lee Sisters (8-05-1943)
                                             'bpm'  90.25
                                    'search_title'  '05':14 '1943':15 '8':13 '8051943':16 'four':10 'get':4 'his':8 'lee':11 'let':1 'lets':3 'lost':5 'monroe':7 'orchestra':9 's':2 'sisters':12 'vaughn':6
                                   'search_artist'  'four':5 'his':3 'lee':6 'monroe':2 'orchestra':4 'sisters':7 'vaughn':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 'country':4 'exotica':2 'jazz':1 'let':6 'oldies':3 'prerock':8 's':7 'swing':9
                                    'search_combo'  '00oldiepop':28 '05':14A '1943':15A '8':13A '8051943':16A 'country':27 'exotica':25 'four':10A,21B 'get':4A 'his':8A,19B 'jazz':24 'lee':11A,22B 'let':1A,29 'lets':3A 'lost':5A 'monroe':7A,18B 'oldies':26 'orchestra':9A,20B 'prerock':31 's':2A,30 'sisters':12A,23B 'swing':32 'vaughn':6A,17B
                                    'tag_tracknum'  42
                                      'num_images'  0
                                             'key'  6A
                                           '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-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1943
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561809.714992  (2021-05-09 14:03:29)
                             'size'  2855938