======================== unified (from filesystem) ========================
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                                        'duration'  '472'
                                          'artist'  'Sia'
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                                           'title'  'Drink to Get Drunk (Different Gear mix)'
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                                      'lastfmtags'  "['indie', 'downtempo', 'trip hop', 'female vocalists', 'chillout']"
                                     'discogstags'  "['electronic', 'downtempo']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  ''
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-pop'
                                             'bpm'  '129.0'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

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'TALB' (Album/Movie/Show title)                     'Healing Is Difficult'
'TBPM' (BPM (beats per minute))                     '129.0'
'TCMP'                                              '0'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-pop'
'TDRC' (Recording time)                             '2001'
'TDRL' (Release time)                               '2001'
'TDTG' (Tagging time)                               '2008-02-14 14:31:30'
'TIT2' (Title/songname/content description)         'Drink to Get Drunk (Different Gear mix)'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Sia'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '13'
'TSOP' (Performer sort order)                       'Sia'
'TXXX:FMPS_Rating'                                  '0.6'
'TXXX:MP3GAIN_MINMAX'                               '072,205'
'TXXX:MP3GAIN_UNDO'                                 '+005,+005,N'
'TXXX:MusicBrainz Album Artist'                     'Sia'
'TXXX:MusicBrainz Album Artist Id'                  '2f548675-008d-4332-876c-108b0c7ab9c5'
'TXXX:MusicBrainz Album Artist Sortname'            'Sia'
'TXXX:MusicBrainz Album Id'                         '36e312ba-3351-4dd7-98b3-9af83956aad8'
'TXXX:MusicBrainz Album Release Country'            'GB'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '2f548675-008d-4332-876c-108b0c7ab9c5'
'TXXX:MusicBrainz Non-Album'                        '0'
'TXXX:MusicIP PUID'                                 '1ec5a077-9555-e17b-8525-e56fc609fa51'
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'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['electronic', 'downtempo']
'TXXX:lastfmtags'                                   ['indie', 'downtempo', 'trip hop', 'female vocalists', 'chillout']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.41 dB'
'TXXX:replaygain_track_peak'                        '0.429754'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'1fa6992f-0c63-48c2-8d53-c69f5b4a629a')

========================== row from database ==========================
                                              'id'  1459713
                                            'path'  /data/Music/Bulk/00poprockelectronic/Sia/Sia - Healing Is Difficult/Sia - Healing Is Difficult - 13 - Drink to Get Drunk (Different Gear mix).mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  472
                                           'genre'  ifs-songwriter-pop
                                        'filesize'  15131650
                                           'mtime'  1620572064
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 13 ifs songwriter pop
                                      'tag_artist'  Sia
                                     'tag_release'  Healing Is Difficult
                                       'tag_title'  Drink to Get Drunk (Different Gear mix)
                                             'bpm'  129.0
                                    'search_title'  'different':5,6 'drink':1 'drunk':4 'gear':7 'get':3 'mix':8,9 'to':2
                                   'search_artist'  'sia':1
                                  'search_release'  'difficult':3 'healing':1 'is':2
                                     'search_rest'  '00poprockelectronic':1 'ifs':2 'pop':4 'songwriter':3
                                    'search_combo'  '00poprockelectronic':14 'different':5A,6A 'difficult':13C 'drink':1A 'drunk':4A 'gear':7A 'get':3A 'healing':11C 'ifs':15 'is':12C 'mix':8A,9A 'pop':17 'sia':10B 'songwriter':16 'to':2A
                                    'tag_tracknum'  13
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-4', 'q-other-1', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'downtempo', 'trip hop', 'female vocalists', 'chillout']
                                        'tag_date'  2001
                                     'discogstags'  ['electronic', 'downtempo']

============================== file details ==============================
                                           'mtime'  1620572063.9772906  (2021-05-09 16:54:23)
                             'size'  15131650