======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '129'
                                          'artist'  'Al Bowlly & Ray Noble'
                                     'text_people'  ''
                                         'release'  'HMV B-6366, Matrix OB-6598-2'
                                           'title'  'I Only Want One Girl (Valentine/John/Broomes) '
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'Q-PLAY-2', 'q-bass-2', 'q-busy-3', 'q-grit-1', "
 "'Q-PIANO-2', 'q-chart-2', 'q-drums-1', 'q-other-4', 'q-vocals-3', "
 "'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'  '97.225'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'HMV B-6366, Matrix OB-6598-2'
'TBPM' (BPM (beats per minute))                     '97.225'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1925'
'TIT2' (Title/songname/content description)         'I Only Want One Girl (Valentine/John/Broomes) '
'TKEY' (Initial key)                                '7B'
'TLEN' (Length)                                     '129706'
'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-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['jazz', '30s', 'oldies', 'crooner', 'british']
'TXXX:q-bass'                                       '2'
'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-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+2.84 dB'
'TXXX:replaygain_track_peak'                        '0.597614'

========================== row from database ==========================
                                              'id'  1148770
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Al Bowlly, Ray Noble - I Only Want One Girl 1933.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  129
                                           'genre'  prerock-vocal
                                        'filesize'  2103296
                                           'mtime'  1620666339
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s and 1930s popular Bowlly, 1933 prerock vocal
                                      'tag_artist'  Al Bowlly & Ray Noble
                                     'tag_release'  HMV B-6366, Matrix OB-6598-2
                                       'tag_title'  I Only Want One Girl (Valentine/John/Broomes) 
                                             'bpm'  97.225
                                    'search_title'  'broomes':8 'girl':5 'i':1 'john':7 'one':4 'only':2 'valentine':6 'valentinejohnbroomes':9 'want':3
                                   'search_artist'  'al':1 'bowlly':2 'noble':4 'ray':3
                                  'search_release'  '2':8 '6366':3 '6598':7 'b':2 'b6366':4 'hmv':1 'matrix':5 'ob':6 'ob65982':9
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':8 '1933':12 'and':7 'bowlly':10,11 'country':4 'exotica':2 'jazz':1 'oldies':3 'popular':9 'prerock':13 'vocal':14
                                    'search_combo'  '00oldiepop':27 '1920s':28 '1930s':30 '1933':34 '2':21C '6366':16C '6598':20C 'al':10B 'and':29 'b':15C 'b6366':17C 'bowlly':11B,32,33 'broomes':8A 'country':26 'exotica':24 'girl':5A 'hmv':14C 'i':1A 'jazz':23 'john':7A 'matrix':18C 'noble':13B 'ob':19C 'ob65982':22C 'oldies':25 'one':4A 'only':2A 'popular':31 'prerock':35 'ray':12B 'valentine':6A 'valentinejohnbroomes':9A 'vocal':36 'want':3A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-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-PLAY-2', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['jazz', '30s', 'oldies', 'crooner', 'british']
                                        'tag_date'  1925
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620666338.8984764  (2021-05-10 19:05:38)
                             'size'  2103296