======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '175'
                                          'artist'  "Lightnin' Hopkins"
                                     'text_people'  ''
                                         'release'  "Lightnin' Hopkins [Jazz Man]"
                                           'title'  'Penitentiary Blues'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-3', 'Q-LOCALNESS-3', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['guitar', 'blues', 'texas blues', 'delta blues', 'classic blues']"
                                     'discogstags'  "['blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '01'
                                      'tracktotal'  ''
                                            'date'  '1959'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '119.405'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            ' 00000088 0000008D 000004AA'
'COMM:iTunNORM:eng'                                 (' 00000088 0000008D 000004AA 000004D5 000186B7 000186B7 000034CB 00003615 '
 '000186CE 000186CE')
'TALB' (Album/Movie/Show title)                     "Lightnin' Hopkins [Jazz Man]"
'TBPM' (BPM (beats per minute))                     '119.405'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TDRC' (Recording time)                             '1959'
'TIT2' (Title/songname/content description)         'Penitentiary Blues'
'TKEY' (Initial key)                                '11B'
'TLEN' (Length)                                     '175000'
'TPE1' (Lead performer(s)/Soloist(s))               "Lightnin' Hopkins"
'TRCK' (Track number/Position in set)               '01'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'blues'
'TXXX:lastfmtags'                                   ['guitar', 'blues', 'texas blues', 'delta blues', 'classic blues']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+3.28 dB'
'TXXX:replaygain_track_peak'                        '0.753254'

========================== row from database ==========================
                                              'id'  1528099
                                            'path'  /data/Music/Bulk/00poprockelectronic/Lightnin_ Hopkins/Smithsonian - Folkways/Lightnin_ Hopkins - Lightnin_ Hopkins [Jazz Man] - 01 - Penitentiary Blues.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  175
                                           'genre'  prerock-jb-blues
                                        'filesize'  4205819
                                           'mtime'  1620403776
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Lightnin_ Smithsonian Folkways Lightnin_ Lightnin_ 01 prerock jb blues
                                      'tag_artist'  Lightnin' Hopkins
                                     'tag_release'  Lightnin' Hopkins [Jazz Man]
                                       'tag_title'  Penitentiary Blues
                                             'bpm'  119.405
                                    'search_title'  'blues':2 'penitentiary':1
                                   'search_artist'  'hopkins':3 'lightnin':1,2
                                  'search_release'  'hopkins':3 'jazz':4,5 'lightnin':1,2 'man':6,7
                                     'search_rest'  '00poprockelectronic':1 'blues':7 'folkways':4 'jb':6 'lightnin':2 'prerock':5 'smithsonian':3
                                    'search_combo'  '00poprockelectronic':13 'blues':2A,19 'folkways':16 'hopkins':5B,8C 'jazz':9C,10C 'jb':18 'lightnin':3B,4B,6C,7C,14 'man':11C,12C 'penitentiary':1A 'prerock':17 'smithsonian':15
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['guitar', 'blues', 'texas blues', 'delta blues', 'classic blues']
                                        'tag_date'  1959
                                     'discogstags'  ['blues']

============================== file details ==============================
                                           'mtime'  1620403775.7985451  (2021-05-07 18:09:35)
                             'size'  4205819