======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '261'
                                          'artist'  'Nirvana'
                                     'text_people'  ''
                                         'release'  'MTV Unplugged in New York'
                                           'title'  'The Man Who Sold the World'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', "
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 "'q-chart-4', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['alternative rock', '90s', 'alternative', 'grunge', 'rock']"
                                     'discogstags'  "['acoustic', 'alternative rock', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  '14'
                                            'date'  '2009'
                                        'comments'  ''
                                           'genre'  'rock-gr-grunge'
                                             'bpm'  '117'
                                             'key'  '12A'
                                        'acoustid'  'e3429ec2-0304-4ed0-a5ba-3597d495c81e'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'MTV Unplugged in New York'
'TBPM' (BPM (beats per minute))                     '117'
'TCON' (Content type, a.k.a. Genre)                 'rock-gr-grunge'
'TDOR' (Original release time)                      '1994'
'TDRC' (Recording time)                             '2009-03-02'
'TIT2' (Title/songname/content description)         'The Man Who Sold the World'
'TKEY' (Initial key)                                '12A'
'TMED' (Media type)                                 'SHM-CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Nirvana'
'TPE2' (Band/orchestra/accompaniment)               'Nirvana'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Geffen Records'
'TRCK' (Track number/Position in set)               '4/14'
'TSO2'                                              'Nirvana'
'TSOP' (Performer sort order)                       'Nirvana'
'TSRC' (ISRC (international standard recording code))  'USGF19972704'
'TXXX:Acoustid Id'                                  'e3429ec2-0304-4ed0-a5ba-3597d495c81e'
'TXXX:Artists'                                      'Nirvana'
'TXXX:BARCODE'                                      '4988005525352'
'TXXX:CATALOGNUMBER'                                'UICY-91062'
'TXXX:Mp3gain_minmax'                               '146,193'
'TXXX:Mp3gain_undo'                                 '+005,+005,N'
'TXXX:MusicBrainz Album Artist Id'                  '5b11f4ce-a62d-471e-81fc-a69a8278c7da'
'TXXX:MusicBrainz Album Id'                         '47e459c9-ad7f-4f64-8b2e-1421d9e1e78f'
'TXXX:MusicBrainz Album Release Country'            'JP'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/live'
'TXXX:MusicBrainz Artist Id'                        '5b11f4ce-a62d-471e-81fc-a69a8278c7da'
'TXXX:MusicBrainz Release Group Id'                 'fb3770f6-83fb-32b7-85c4-1f522a92287e'
'TXXX:MusicBrainz Release Track Id'                 '643f8097-0b16-4d88-9ed1-897c6716c71e'
'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:discogstags'                                  ['acoustic', 'alternative rock', 'rock']
'TXXX:lastfmtags'                                   ['alternative rock', '90s', 'alternative', 'grunge', 'rock']
'TXXX:originalyear'                                 '1994'
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.17 dB'
'TXXX:replaygain_track_peak'                        '0.482514'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'2a5c6d93-f153-44e5-b747-2bd7b5156212')

========================== row from database ==========================
                                              'id'  1354431
                                            'path'  /data/Music/Bulk/00poprockelectronic/Nirvana/Unplugged in NY/Nirvana - The Man Who Sold the World.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  261
                                           'genre'  rock-gr-grunge
                                        'filesize'  4283135
                                           'mtime'  1636903007
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic NY rock gr grunge
                                      'tag_artist'  Nirvana
                                     'tag_release'  MTV Unplugged in New York
                                       'tag_title'  The Man Who Sold the World
                                             'bpm'  117.0
                                    'search_title'  'man':2 'sold':4 'the':1 'who':3 'world':5
                                   'search_artist'  'nirvana':1
                                  'search_release'  'in':3 'mtv':1 'new':4 'unplugged':2 'york':5
                                     'search_rest'  '00poprockelectronic':1 'gr':4 'grunge':5 'ny':2 'rock':3
                                    'search_combo'  '00poprockelectronic':12 'gr':15 'grunge':16 'in':9C 'man':2A 'mtv':7C 'new':10C 'nirvana':6B 'ny':13 'rock':14 'sold':4A 'the':1A 'unplugged':8C 'who':3A 'world':5A 'york':11C
                                    'tag_tracknum'  4
                                      'num_images'  1
                                             'key'  12A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-2', 'q-bass-3', 'q-grit-3']
                                      'lastfmtags'  ['alternative rock', '90s', 'alternative', 'grunge', 'rock']
                                        'tag_date'  2009
                                     'discogstags'  ['acoustic', 'alternative rock', 'rock']

============================== file details ==============================
                                           'mtime'  1636903006.9919155  (2021-11-14 16:16:46)
                             'size'  4283135