======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '176'
                                          'artist'  'Canario y Su Grupo'
                                     'text_people'  ''
                                         'release'  'The Secret Museum of Mankind, Volume 2: Ethnic Music Classics 1925-48'
                                           'title'  'Aguinaldo de Navidad'
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                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  '23'
                                            'date'  '1995'
                                        'comments'  ''
                                           'genre'  'loc-unsorted'
                                             'bpm'  '138.702'
                                             'key'  '12B'
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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)         'Aguinaldo de Navidad'
'TKEY' (Initial key)                                '12B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Canario y Su Grupo'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Yazoo Records'
'TRCK' (Track number/Position in set)               '3/23'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Canario y Su Grupo'
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'TXXX:Acoustid Id'                                  '720087a0-20ba-4dcf-bd1e-1a33a92fbf5d'
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'TXXX:MusicBrainz Album Id'                         '32303cdd-29f5-4bb7-9ec2-e8c7178bc482'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'compilation'
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'TXXX:Q-JZFKS'                                      '1'
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'TXXX:q-bass'                                       '1'
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'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.94 dB'
'TXXX:replaygain_track_peak'                        '0.415223'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'40e2140a-8af4-4ff1-a78b-6a01845a807d')

========================== row from database ==========================
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                                            'path'  /data/Music/Bulk/00localcharacter/the secret museum of mankind vol. 2 (ethnic music classics 1925-48)/03 (PUERTO RICO) Canario Y Su Grupo - Aguinaldo De Vavidad.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  176
                                           'genre'  loc-unsorted
                                        'filesize'  2822067
                                           'mtime'  1621627309
                                   'redo_metaread'  0
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                                      'tag_artist'  Canario y Su Grupo
                                     'tag_release'  The Secret Museum of Mankind, Volume 2: Ethnic Music Classics 1925-48
                                       'tag_title'  Aguinaldo de Navidad
                                             'bpm'  138.702
                                    'search_title'  'aguinaldo':1 'de':2 'navidad':3
                                   'search_artist'  'canario':1 'grupo':4 'su':3 'y':2
                                  'search_release'  '1925':13 '192548':15 '2':8,9 '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 'classics':10 'de':18 'ethnic':7,8 'loc':20 'mankind':4 'museum':3 'music':9 'puerto':13,14 'rico':15,16 'secret':2 'the':1 'unsorted':21 'vavidad':19 'vol':5,6 'y':17
                                    'search_combo'  '1925':20C '192548':22C '2':15C,16C '48':21C,33,34 'aguinaldo':1A 'canario':4B 'classics':19C,32 'de':2A,40 'ethnic':17C,29,30 'grupo':7B 'loc':42 'mankind':12C,13C,26 'museum':10C,25 'music':18C,31 'navidad':3A 'of':11C 'puerto':35,36 'rico':37,38 'secret':9C,24 'su':6B 'the':8C,23 'unsorted':43 'vavidad':41 'vol':27,28 'volume':14C 'y':5B,39
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  12B
                                           '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-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['latin', 'plena', 'cuba', 'lesser known yet streamable artists', 'various artists are a pita on lastfm']
                                        'tag_date'  1995
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627309.3751361  (2021-05-21 22:01:49)
                             'size'  2822067