======================== unified (from filesystem) ========================
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                                        'duration'  '310'
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                                           'title'  "You Just Can't Sleep"
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                                      'lastfmtags'  "['post punk', 'new wave', 'minimal synth', 'industrial', 'noise']"
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                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '14'
                                      'tracktotal'  '20'
                                            'date'  '2008'
                                        'comments'  ''
                                           'genre'  'loc-eur-netherlands'
                                             'bpm'  '124.5'
                                             'key'  '9A'
                                        'acoustid'  '449c8547-c76e-4dd8-bbeb-031d33e7cc13'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM::\x00\x00\x00'                                'High Quality, EAC secure, Lossless flac '
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'TBPM' (BPM (beats per minute))                     '124.5'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'loc-eur-netherlands'
'TDOR' (Original release time)                      '2008'
'TDRC' (Recording time)                             '2008'
'TIT2' (Title/songname/content description)         "You Just Can't Sleep"
'TKEY' (Initial key)                                '9A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'The Tapes'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '3/4'
'TPUB' (Publisher)                                  'Universal Music'
'TRCK' (Track number/Position in set)               '14/20'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Tapes, The'
'TXXX:ASIN'                                         'B001ERJS06'
'TXXX:Acoustid Id'                                  '449c8547-c76e-4dd8-bbeb-031d33e7cc13'
'TXXX:Artists'                                      'The Tapes'
'TXXX:BARCODE'                                      '0602517851573'
'TXXX:CATALOGNUMBER'                                '178 515-7/178 515-8/178 515-9/178 516-0/178 516-1'
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'TXXX:MusicBrainz Album Id'                         'b600b3aa-2811-4995-ada8-84616dc2501b'
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'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
'TXXX:MusicBrainz Artist Id'                        'c7252bf1-62a0-4eaa-ad83-92ce479ff4a6'
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'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['post punk', 'new wave', 'minimal synth', 'industrial', 'noise']
'TXXX:originalyear'                                 '2008'
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.36 dB'
'TXXX:replaygain_track_peak'                        '0.505358'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'e42c419f-a9ed-4bc3-9956-ccdd9658c763')

========================== row from database ==========================
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                                            'path'  /data/Music/Bulk/00localcharacter/00mid-north-europe/The Ricochets feat. Ritchie Clark - Various - 50 Jaar Nederpop- Rare & Obscure/Various - 50 Jaar Nederpop  Rare & Obscure CD3/14 - You Just Can_t Sleep.mp3
                                         'working'  None
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                                    'duration_sec'  310
                                           'genre'  loc-eur-netherlands
                                        'filesize'  10113417
                                           'mtime'  1621629556
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00mid north europe Ricochets feat. Ritchie Clark Various Jaar Nederpop Various Jaar Nederpop CD3 14 Can_t loc eur netherlands
                                      'tag_artist'  The Tapes
                                     'tag_release'  50 jaar nederpop: Rare & Obscure
                                       'tag_title'  You Just Can't Sleep
                                             'bpm'  124.5
                                    'search_title'  'can':3 'cant':5 'just':2 'sleep':6 't':4 'you':1
                                   'search_artist'  'tapes':2 'the':1
                                  'search_release'  '50':1 'jaar':2 'nederpop':3,4 'obscure':6 'rare':5
                                     'search_rest'  '00mid':1 'can':13 'cd3':12 'clark':8 'eur':16 'europe':3 'feat':5,6 'jaar':10 'loc':15 'nederpop':11 'netherlands':17 'north':2 'ricochets':4 'ritchie':7 't':14 'various':9
                                    'search_combo'  '00mid':15 '50':9C 'can':3A,27 'cant':5A 'cd3':26 'clark':22 'eur':30 'europe':17 'feat':19,20 'jaar':10C,24 'just':2A 'loc':29 'nederpop':11C,12C,25 'netherlands':31 'north':16 'obscure':14C 'rare':13C 'ricochets':18 'ritchie':21 'sleep':6A 't':4A,28 'tapes':8B 'the':7B 'various':23 'you':1A
                                    'tag_tracknum'  14
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['post punk', 'new wave', 'minimal synth', 'industrial', 'noise']
                                        'tag_date'  2008
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1621629556.1033652  (2021-05-21 22:39:16)
                             'size'  10113417