======================== unified (from filesystem) ========================
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                                        'duration'  '260'
                                          'artist'  'The Cure'
                                     'text_people'  ''
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                                           'title'  'A Letter to Elise'
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                                      'lastfmtags'  "['80s', 'new wave', 'alternative', 'post punk', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  '18'
                                            'date'  '1997'
                                        'comments'  ''
                                           'genre'  'electronic-we-new wave or post punk'
                                             'bpm'  '150'
                                             'key'  '3A'
                                        'acoustid'  '429f2478-2b8b-4d92-9d75-9920fbe335df'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Galore: The Singles 1987-1997'
'TBPM' (BPM (beats per minute))                     '150'
'TCON' (Content type, a.k.a. Genre)                 'electronic-we-new wave or post punk'
'TDOR' (Original release time)                      '1997'
'TDRC' (Recording time)                             '1997'
'TEXT' (Lyricist/Text writer)                       'Robert Smith'
'TIT2' (Title/songname/content description)         'A Letter to Elise'
'TKEY' (Initial key)                                '3A'
'TLEN' (Length)                                     '260000'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'The Cure'
'TPE2' (Band/orchestra/accompaniment)               'The Cure'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Columbia House/Elektra'
'TRCK' (Track number/Position in set)               '13/18'
'TSO2'                                              'Cure, The'
'TSOP' (Performer sort order)                       'Cure, The'
'TSRC' (ISRC (international standard recording code))  'GBALB9200003'
'TXXX:Acoustid Id'                                  '429f2478-2b8b-4d92-9d75-9920fbe335df'
'TXXX:Artists'                                      'The Cure'
'TXXX:CATALOGNUMBER'                                'E2 62117'
'TXXX:MusicBrainz Album Artist Id'                  '69ee3720-a7cb-4402-b48d-a02c366f2bcf'
'TXXX:MusicBrainz Album Id'                         'bbbd4c43-3e24-3cb7-9e31-befd6e6388c3'
'TXXX:MusicBrainz Album Release Country'            'CA'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
'TXXX:MusicBrainz Artist Id'                        '69ee3720-a7cb-4402-b48d-a02c366f2bcf'
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'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['80s', 'new wave', 'alternative', 'post punk', 'rock']
'TXXX:originalyear'                                 '1997'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.71 dB'
'TXXX:replaygain_track_peak'                        '0.428236'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'440185ad-4153-437c-b97d-e73b9f734113')

========================== row from database ==========================
                                              'id'  1523502
                                            'path'  /data/Music/Bulk/00poprockelectronic-waves-disco/00newwave-postpunk/The Cure/Galore (The Singles _87-_97)/The Cure - A Letter to Elise.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  260
                                           'genre'  electronic-we-new wave or post punk
                                        'filesize'  4228331
                                           'mtime'  1620606906
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic waves disco 00newwave postpunk (The _87 _97) electronic we new wave post punk
                                      'tag_artist'  The Cure
                                     'tag_release'  Galore: The Singles 1987-1997
                                       'tag_title'  A Letter to Elise
                                             'bpm'  150.0
                                    'search_title'  'a':1 'elise':4 'letter':2 'to':3
                                   'search_artist'  'cure':2 'the':1
                                  'search_release'  '1987':5 '19871997':7 '1997':6 'galore':1,2 'singles':4 'the':3
                                     'search_rest'  '00newwave':4 '00poprockelectronic':1 '87':8 '97':9,10 'disco':3 'electronic':11 'new':13 'post':15 'postpunk':5 'punk':16 'the':6,7 'wave':14 'waves':2 'we':12
                                    'search_combo'  '00newwave':17 '00poprockelectronic':14 '1987':11C '19871997':13C '1997':12C '87':21 '97':22,23 'a':1A 'cure':6B 'disco':16 'electronic':24 'elise':4A 'galore':7C,8C 'letter':2A 'new':26 'post':28 'postpunk':18 'punk':29 'singles':10C 'the':5B,9C,19,20 'to':3A 'wave':27 'waves':15 'we':25
                                    'tag_tracknum'  13
                                      'num_images'  1
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'new wave', 'alternative', 'post punk', 'rock']
                                        'tag_date'  1997
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620606906.0914383  (2021-05-10 02:35:06)
                             'size'  4228331