======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '188'
                                          'artist'  'Al Bowlly & Ray Noble'
                                     'text_people'  ''
                                         'release'  'HMV B-6319, Matrix OB-6435-2, Victor 24278'
                                           'title'  'Love Tales (Davis/Stept/Ager) 7-2-1933'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', '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-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', '30s', 'oldies', 'crooner', 'british']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1933'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '89.532'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'HMV B-6319, Matrix OB-6435-2, Victor 24278'
'TBPM' (BPM (beats per minute))                     '89.532'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1933'
'TIT2' (Title/songname/content description)         'Love Tales (Davis/Stept/Ager) 7-2-1933'
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '188717'
'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'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.82 dB'
'TXXX:replaygain_track_peak'                        '0.572623'

========================== row from database ==========================
                                              'id'  1156124
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Al Bowlly, Ray Noble - Love Tales 1933.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  188
                                           'genre'  prerock-vocal
                                        'filesize'  3045346
                                           'mtime'  1620666341
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s and 1930s popular Bowlly, prerock vocal
                                      'tag_artist'  Al Bowlly & Ray Noble
                                     'tag_release'  HMV B-6319, Matrix OB-6435-2, Victor 24278
                                       'tag_title'  Love Tales (Davis/Stept/Ager) 7-2-1933
                                             'bpm'  89.532
                                    'search_title'  '1933':9 '2':8 '7':7 '721933':10 'ager':5 'davis':3 'davissteptager':6 'love':1 'stept':4 'tales':2
                                   'search_artist'  'al':1 'bowlly':2 'noble':4 'ray':3
                                  'search_release'  '2':8 '24278':11 '6319':3 '6435':7 'b':2 'b6319':4 'hmv':1 'matrix':5 'ob':6 'ob64352':9 'victor':10
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':8 'and':7 'bowlly':10,11 'country':4 'exotica':2 'jazz':1 'oldies':3 'popular':9 'prerock':12 'vocal':13
                                    'search_combo'  '00oldiepop':30 '1920s':31 '1930s':33 '1933':9A '2':8A,22C '24278':25C '6319':17C '6435':21C '7':7A '721933':10A 'ager':5A 'al':11B 'and':32 'b':16C 'b6319':18C 'bowlly':12B,35,36 'country':29 'davis':3A 'davissteptager':6A 'exotica':27 'hmv':15C 'jazz':26 'love':1A 'matrix':19C 'noble':14B 'ob':20C 'ob64352':23C 'oldies':28 'popular':34 'prerock':37 'ray':13B 'stept':4A 'tales':2A 'victor':24C 'vocal':38
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['jazz', '30s', 'oldies', 'crooner', 'british']
                                        'tag_date'  1933
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620666340.59634  (2021-05-10 19:05:40)
                             'size'  3045346