======================== unified (from filesystem) ========================
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                                        'duration'  '273'
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                                     'text_people'  ''
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                                      'lastfmtags'  ("['black metal', 'progressive black metal', 'orthodox black metal', 'french', "
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                                     'discogstags'  "['black metal', 'rock']"
                             'musicbrainz_albumid'  ''
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                            'musicbrainz_artistid'  ''
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                                     'tracknumber'  '7'
                                      'tracktotal'  '8'
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'eid-metal-black'
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                                             'key'  '5B'
                                        'acoustid'  'd11b0bac-3d64-4a39-b2c9-9d58fbc28444'
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '127.1'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-black'
'TDOR' (Original release time)                      '2000'
'TDRC' (Recording time)                             '2000-06-20'
'TIT2' (Title/songname/content description)         'Knowledge of the Ultimate Void'
'TKEY' (Initial key)                                '5B'
'TLEN' (Length)                                     '273000'
'TMED' (Media type)                                 '12" Vinyl'
'TPE1' (Lead performer(s)/Soloist(s))               'Deathspell Omega'
'TPE2' (Band/orchestra/accompaniment)               'Deathspell Omega'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Northern Heritage'
'TRCK' (Track number/Position in set)               '7/8'
'TSO2'                                              'Deathspell Omega'
'TSOP' (Performer sort order)                       'Deathspell Omega'
'TXXX:Acoustid Id'                                  'd11b0bac-3d64-4a39-b2c9-9d58fbc28444'
'TXXX:Artists'                                      'Deathspell Omega'
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'TXXX:MusicBrainz Album Id'                         'dfde7d73-e337-4a5a-9686-8bed5d346b12'
'TXXX:MusicBrainz Album Release Country'            'FI'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '37ea73dd-a48c-4659-8b9d-5c77bd9cbd12'
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'TXXX:Q-HHRNBTT'                                    '1'
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'TXXX:Q-MIXBEAT'                                    '1'
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'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-SYN'                                        '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['black metal', 'rock']
'TXXX:lastfmtags'                                   ['black metal',
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 'orthodox black metal',
 'french',
 'avant-garde metal']
'TXXX:originalyear'                                 '2000'
'TXXX:q-bass'                                       '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-1.25 dB'
'TXXX:replaygain_track_peak'                        '0.500733'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'82955708-00dc-4b0e-a089-75bdec2983c1')

========================== row from database ==========================
                                              'id'  1485256
                                            'path'  /data/Music/Bulk/00poprockelectronic/[ 2000 ] Infernal Battles/07 knowledge of the ultimate void.mp3
                                         'working'  None
                                         'bitrate'  209
                                    'duration_sec'  273
                                           'genre'  eid-metal-black
                                        'filesize'  7171972
                                           'mtime'  1620301982
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic [ 2000 ] 07 knowledge ultimate void eid metal black
                                      'tag_artist'  Deathspell Omega
                                     'tag_release'  Infernal Battles
                                       'tag_title'  Knowledge of the Ultimate Void
                                             'bpm'  127.1
                                    'search_title'  'knowledge':1 'of':2 'the':3 'ultimate':4 'void':5
                                   'search_artist'  'deathspell':1 'omega':2
                                  'search_release'  'battles':2 'infernal':1
                                     'search_rest'  '00poprockelectronic':1 '2000':2 'black':8 'eid':6 'knowledge':3 'metal':7 'ultimate':4 'void':5
                                    'search_combo'  '00poprockelectronic':10 '2000':11 'battles':9C 'black':17 'deathspell':6B 'eid':15 'infernal':8C 'knowledge':1A,12 'metal':16 'of':2A 'omega':7B 'the':3A 'ultimate':4A,13 'void':5A,14
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  5B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-piano-1', 'Q-MIXBEAT-1', 'Q-OLDST-3', 'Q-GRIT-4', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-CHART-2', 'q-drums-2', 'Q-SYN-2', 'q-other-4', 'Q-BUSY-4', 'Q-HAP-1', 'Q-PLAY-2', 'q-bass-2']
                                      'lastfmtags'  ['black metal', 'progressive black metal', 'orthodox black metal', 'french', 'avant-garde metal']
                                        'tag_date'  2000
                                     'discogstags'  ['black metal', 'rock']

============================== file details ==============================
                                           'mtime'  1620301981.8652785  (2021-05-06 13:53:01)
                             'size'  7171972