======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '222'
                                          'artist'  'Al Bowlly & Ray Noble'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  "I'm Misunderstood"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', '30s', 'oldies', 'crooner', 'british']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1925'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '136.920'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '136.920'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1925'
'TIT2' (Title/songname/content description)         "I'm Misunderstood"
'TKEY' (Initial key)                                '2A'
'TLEN' (Length)                                     '222461'
'TPE1' (Lead performer(s)/Soloist(s))               'Al Bowlly & Ray Noble'
'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'                                   ['jazz', '30s', 'oldies', 'crooner', 'british']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'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'                        '+1.03 dB'
'TXXX:replaygain_track_peak'                        '0.421645'

========================== row from database ==========================
                                              'id'  1499116
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Al Bowlly, Ray Noble - I_m Misunderstood (24-4-1935).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  222
                                           'genre'  prerock-vocal
                                        'filesize'  3612672
                                           'mtime'  1620666340
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s and 1930s popular Bowlly, I_m (24 4 1935) prerock vocal
                                      'tag_artist'  Al Bowlly & Ray Noble
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  I'm Misunderstood
                                             'bpm'  136.92
                                    'search_title'  'i':1 'im':3 'm':2 'misunderstood':4
                                   'search_artist'  'al':1 'bowlly':2 'noble':4 'ray':3
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':8 '1935':17,18 '24':14,15 '4':16 'and':7 'bowlly':10,11 'country':4 'exotica':2 'i':12 'jazz':1 'm':13 'oldies':3 'popular':9 'prerock':19 'vocal':20
                                    'search_combo'  '00oldiepop':18 '1920s':19 '1930s':21 '1935':30,31 '24':27,28 '4':29 'al':5B 'album':10C 'and':20 'bowlly':6B,23,24 'country':17 'exotica':15 'i':1A,25 'im':3A 'jazz':14 'm':2A,26 'misunderstood':4A 'noble':8B 'non':9C 'nonalbum':11C 'oldies':16 'popular':22 'prerock':32 'ray':7B 'tracks':12C,13C 'vocal':33
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  2A
                                           '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-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['jazz', '30s', 'oldies', 'crooner', 'british']
                                        'tag_date'  1925
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620666339.6827414  (2021-05-10 19:05:39)
                             'size'  3612672