======================== unified (from filesystem) ========================
                                         'bitrate'  '126.236'
                                        'duration'  '189'
                                          'artist'  'John Lee Hooker'
                                     'text_people'  ''
                                         'release'  'The Ultimate Collection 1948-1990 (Disc 1)'
                                           'title'  'Sally Mae'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-3', 'Q-LOCALNESS-3', 'Q-HHRNBTT-1', 'Q-UNU-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['guitar', 'blues', 'jazz', 'delta blues', 'classic blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '1991'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '90.210'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Ultimate Collection 1948-1990 (Disc 1)'
'TBPM' (BPM (beats per minute))                     '90.210'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TDRC' (Recording time)                             '1991'
'TENC' (Encoded by)                                 'Exact Audio Copy   (Secure mode)'
'TIT2' (Title/songname/content description)         'Sally Mae'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'John Lee Hooker'
'TRCK' (Track number/Position in set)               '3'
'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:lastfmtags'                                   ['guitar', 'blues', 'jazz', 'delta blues', 'classic blues']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.97 dB'
'TXXX:replaygain_track_peak'                        '0.500670'

========================== row from database ==========================
                                              'id'  1290556
                                            'path'  /data/Music/Bulk/00poprockelectronic/musica/John Lee Hooker - The Ultimate Collection 1948-1990 [1991]/John Lee Hooker - The Ultimate Collection 1948-1990 (Disc 1)/03 - Sally Mae.mp3
                                         'working'  None
                                         'bitrate'  126
                                    'duration_sec'  189
                                           'genre'  prerock-jb-blues
                                        'filesize'  2995672
                                           'mtime'  1620403836
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic musica [1991] 03 prerock jb blues
                                      'tag_artist'  John Lee Hooker
                                     'tag_release'  The Ultimate Collection 1948-1990 (Disc 1)
                                       'tag_title'  Sally Mae
                                             'bpm'  90.21
                                    'search_title'  'mae':2 'sally':1
                                   'search_artist'  'hooker':3 'john':1 'lee':2
                                  'search_release'  '1':9,10 '1948':4 '19481990':6 '1990':5 'collection':3 'disc':7,8 'the':1 'ultimate':2
                                     'search_rest'  '00poprockelectronic':1 '1991':3,4 'blues':7 'jb':6 'musica':2 'prerock':5
                                    'search_combo'  '00poprockelectronic':16 '1':14C,15C '1948':9C '19481990':11C '1990':10C '1991':18,19 'blues':22 'collection':8C 'disc':12C,13C 'hooker':5B 'jb':21 'john':3B 'lee':4B 'mae':2A 'musica':17 'prerock':20 'sally':1A 'the':6C 'ultimate':7C
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  3A
                                           '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-3', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['guitar', 'blues', 'jazz', 'delta blues', 'classic blues']
                                        'tag_date'  1991
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620403835.5687788  (2021-05-07 18:10:35)
                             'size'  2995672