======================== unified (from filesystem) ========================
                                         'bitrate'  '189.211'
                                        'duration'  '281'
                                          'artist'  'The Doors'
                                     'text_people'  ''
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                                           'title'  'Been Down So Long'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
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                                      'lastfmtags'  "['rock', 'psychedelic rock', '60s', 'psychedelic', 'classic rock']"
                                     'discogstags'  "['rock', 'blues', 'alternative rock', 'blues rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '1971'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '121.994'
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                                        'acoustid'  ''
rest: ''

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

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'COMM:iTunNORM:eng'                                 (' 000001A7 0000017B 0000093D 00000A08 0003A460 0003A460 0000366B 00003511 '
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'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDOR' (Original release time)                      '1971'
'TDRC' (Recording time)                             '1971'
'TENC' (Encoded by)                                 'Exact Audio Copy   (Secure mode)'
'TIT2' (Title/songname/content description)         'Been Down So Long'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Doors'
'TRCK' (Track number/Position in set)               '3'
'TXXX:MusicBrainz Album Id'                         'e68f23df-61e3-4264-bfc3-17ac3a6f856b'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '9efff43b-3b29-4082-824e-bc82f646f93d'
'TXXX:MusicBrainz TRM Id'                           'f6db5866-fb44-41da-a592-45f6af483697'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'blues', 'alternative rock', 'blues rock']
'TXXX:lastfmtags'                                   ['rock', 'psychedelic rock', '60s', 'psychedelic', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
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'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.85 dB'
'TXXX:replaygain_track_peak'                        '0.473449'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'1ea4881a-2541-4ee5-9871-c36cb0e8bf67')

========================== row from database ==========================
                                              'id'  1413185
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/The Doors/L.A. Woman/03 Been Down So Long.mp3
                                         'working'  None
                                         'bitrate'  189
                                    'duration_sec'  281
                                           'genre'  rock-cppex-classic
                                        'filesize'  6656107
                                           'mtime'  1636038913
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy 03 rock cppex classic
                                      'tag_artist'  The Doors
                                     'tag_release'  L.A. Woman
                                       'tag_title'  Been Down So Long
                                             'bpm'  121.994
                                    'search_title'  'been':1 'down':2 'long':4 'so':3
                                   'search_artist'  'doors':2 'the':1
                                  'search_release'  'a':2 'l':1 'la':3 'woman':4
                                     'search_rest'  'classic':4 'classicprogpsy':1 'cppex':3 'rock':2
                                    'search_combo'  'a':8C 'been':1A 'classic':14 'classicprogpsy':11 'cppex':13 'doors':6B 'down':2A 'l':7C 'la':9C 'long':4A 'rock':12 'so':3A 'the':5B 'woman':10C
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['rock', 'psychedelic rock', '60s', 'psychedelic', 'classic rock']
                                        'tag_date'  1971
                                     'discogstags'  ['rock', 'blues', 'alternative rock', 'blues rock']

============================== file details ==============================
                                           'mtime'  1636038913.1504421  (2021-11-04 16:15:13)
                             'size'  6656107