======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '272'
                                          'artist'  'Fonseka and Party'
                                     'text_people'  ''
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                                           'title'  'Kapirigna'
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                                      'lastfmtags'  "['sri lankan', 'sri lanka', 'ceylon']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  '23'
                                            'date'  '1995'
                                        'comments'  ''
                                           'genre'  'loc-unsorted'
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                                             'key'  '3A'
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rest: ''

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

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'TBPM' (BPM (beats per minute))                     '138.702'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'loc-unsorted'
'TDOR' (Original release time)                      '1995'
'TDRC' (Recording time)                             '1995'
'TIPL' (Involved people list)                       TIPL(encoding=<Encoding.UTF16: 1>, people=[['producer', 'Pat Conte']])
'TIT2' (Title/songname/content description)         'Kapirigna'
'TKEY' (Initial key)                                '3A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Fonseka and Party'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Yazoo Records'
'TRCK' (Track number/Position in set)               '4/23'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Fonseka and Party'
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'TXXX:Acoustid Id'                                  '12b7c118-112d-4e26-af24-338737458b1b'
'TXXX:BARCODE'                                      '016351700421'
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'TXXX:MusicBrainz Album Id'                         '16133d00-4285-4650-b42e-9e256d6763d1'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'compilation'
'TXXX:MusicBrainz Artist Id'                        'ae7c540d-1691-425b-a38f-93b477315c16'
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'TXXX:Q-JZFKS'                                      '1'
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'TXXX:Q-UNU'                                        '2'
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'TXXX:lastfmtags'                                   ['sri lankan', 'sri lanka', 'ceylon']
'TXXX:q-bass'                                       '1'
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'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.98 dB'
'TXXX:replaygain_track_peak'                        '0.513080'
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========================== row from database ==========================
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                                            'path'  /data/Music/Bulk/00localcharacter/the secret museum of mankind vol. 1 (ethnic music classics 1925-48)/04 (ceylon) fonseka and party - kapirigna.mp3
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                                    'duration_sec'  272
                                           'genre'  loc-unsorted
                                        'filesize'  4360018
                                           'mtime'  1621627298
                                   'redo_metaread'  0
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                                     'tag_release'  The Secret Museum of Mankind, Volume 1: Ethnic Music Classics 1925-48
                                       'tag_title'  Kapirigna
                                             'bpm'  138.702
                                    'search_title'  'kapirigna':1
                                   'search_artist'  'and':2 'fonseka':1 'party':3
                                  'search_release'  '1':8,9 '1925':13 '192548':15 '48':14 'classics':12 'ethnic':10 'mankind':5,6 'museum':3 'music':11 'of':4 'secret':2 'the':1 'volume':7
                                     'search_rest'  '48':11,12 'ceylon':13,14 'classics':10 'ethnic':7,8 'fonseka':15 'kapirigna':17 'loc':18 'mankind':4 'museum':3 'music':9 'party':16 'secret':2 'the':1 'unsorted':19 'vol':5,6
                                    'search_combo'  '1':12C,13C '1925':17C '192548':19C '48':18C,30,31 'and':3B 'ceylon':32,33 'classics':16C,29 'ethnic':14C,26,27 'fonseka':2B,34 'kapirigna':1A,36 'loc':37 'mankind':9C,10C,23 'museum':7C,22 'music':15C,28 'of':8C 'party':4B,35 'secret':6C,21 'the':5C,20 'unsorted':38 'vol':24,25 'volume':11C
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-4', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['sri lankan', 'sri lanka', 'ceylon']
                                        'tag_date'  1995
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627298.3264396  (2021-05-21 22:01:38)
                             'size'  4360018