======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '192'
                                          'artist'  'Al Bowlly & Ray Noble'
                                     'text_people'  ''
                                         'release'  'HMV B-6367, Matrix OB-6594-2'
                                           'title'  'Gypsy Fiddles (Wrubell) 16-6-1933'
                                           '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-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'  '98.645'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'HMV B-6367, Matrix OB-6594-2'
'TBPM' (BPM (beats per minute))                     '98.645'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1925'
'TIT2' (Title/songname/content description)         'Gypsy Fiddles (Wrubell) 16-6-1933'
'TKEY' (Initial key)                                '7A'
'TLEN' (Length)                                     '192908'
'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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.94 dB'
'TXXX:replaygain_track_peak'                        '0.705395'

========================== row from database ==========================
                                              'id'  1138126
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Al Bowlly, Ray Noble - Gypsy Fiddles 1933.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  192
                                           'genre'  prerock-vocal
                                        'filesize'  3110912
                                           'mtime'  1620666338
                                   '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-6367, Matrix OB-6594-2
                                       'tag_title'  Gypsy Fiddles (Wrubell) 16-6-1933
                                             'bpm'  98.645
                                    'search_title'  '16':5 '1661933':8 '1933':7 '6':6 'fiddles':2 'gypsy':1 'wrubell':3,4
                                   'search_artist'  'al':1 'bowlly':2 'noble':4 'ray':3
                                  'search_release'  '2':8 '6367':3 '6594':7 'b':2 'b6367':4 'hmv':1 'matrix':5 'ob':6 'ob65942':9
                                     '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':26 '16':5A '1661933':8A '1920s':27 '1930s':29 '1933':7A '2':20C '6':6A '6367':15C '6594':19C 'al':9B 'and':28 'b':14C 'b6367':16C 'bowlly':10B,31,32 'country':25 'exotica':23 'fiddles':2A 'gypsy':1A 'hmv':13C 'jazz':22 'matrix':17C 'noble':12B 'ob':18C 'ob65942':21C 'oldies':24 'popular':30 'prerock':33 'ray':11B 'vocal':34 'wrubell':3A,4A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  7A
                                           '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-3', 'q-grit-1']
                                      'lastfmtags'  ['jazz', '30s', 'oldies', 'crooner', 'british']
                                        'tag_date'  1925
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620666337.5749567  (2021-05-10 19:05:37)
                             'size'  3110912