<pre>
======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '361'
                                          'artist'  'Tzotziles'
                                     'text_people'  ''
                                         'release'  'Illuminated'
                                           'title'  ("Tzotzil Music Heralding All Saints' Day (Fireworks, Drums, Voices and Bells "
 'on the Night of 31st October - San Pedro Chenalho, Mexico)')
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-2', 'Q-UNU-2', 'Q-LOCALNESS-3', "
 "'Q-HHRNBTT-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  '14'
                                            'date'  '1996'
                                        'comments'  ''
                                           'genre'  'loc-unsorted'
                                             'bpm'  '129.398'
                                             'key'  '6A'
                                        'acoustid'  'b8f1fd07-080c-4548-9e14-6f730e4fe721'
rest: ''

======================== rawer (from filesystem) ========================<mutagen.mp3.MPEGInfo object at 0x7f9537d81670>

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''<br/>                                     <img style="width:150px" src="image?fid=1502178"/>
'MCDI' (Music CD identifier)                        MCDI(data=b'E\x00+\x00B\x006\x00+\x002\x008\x000\x000\x00+\x00B\x001\x002\x001\x00+\x001\x001\x00B\x003\x001\x00+\x001\x006\x004\x003\x00D\x00+\x001\x007\x009\x003\x005\x00+\x001\x00B\x008\x002\x00A\x00+\x001\x00E\x006\x00F\x001\x00+\x002\x008\x005\x00B\x001\x00+\x002\x00B\x002\x00E\x00B\x00+\x002\x00D\x00E\x001\x007\x00+\x003\x000\x009\x003\x005\x00+\x003\x009\x005\x003\x00A\x00+\x003\x00C\x00B\x000\x00E\x00+\x003\x00D\x00D\x003\x000\x00\x00\x00')
'PRIV:AverageLevel:{\x0b\x00\x00'                   PRIV(owner='AverageLevel', data=b'{\x0b\x00\x00')
'PRIV:PeakValue:!\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'!\x7f\x00\x00')
'PRIV:WM/MediaClassPrimaryID:¼}`Ñ#ãâK\x86¡H¤*(D\x1e'  PRIV(owner='WM/MediaClassPrimaryID', data=b'\xbc}`\xd1#\xe3\xe2K\x86\xa1H\xa4*(D\x1e')
'PRIV:WM/MediaClassSecondaryID:\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'  PRIV(owner='WM/MediaClassSecondaryID', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
'PRIV:WM/Provider:A\x00M\x00G\x00\x00\x00'          PRIV(owner='WM/Provider', data=b'A\x00M\x00G\x00\x00\x00')
'PRIV:WM/UniqueFileIdentifier:A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x002\x009\x001\x001\x008\x008\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x002\x001\x002\x008\x001\x007\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x004\x004\x001\x004\x004\x009\x004\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x002\x009\x001\x001\x008\x008\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x002\x001\x002\x008\x001\x007\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x004\x004\x001\x004\x004\x009\x004\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:\x12\x81ÜL /ÂF¼ìØ\x0bàûhw'  PRIV(owner='WM/WMCollectionGroupID', data=b'\x12\x81\xdcL /\xc2F\xbc\xec\xd8\x0b\xe0\xfbhw')
'PRIV:WM/WMCollectionID:\x12\x81ÜL /ÂF¼ìØ\x0bàûhw'  PRIV(owner='WM/WMCollectionID', data=b'\x12\x81\xdcL /\xc2F\xbc\xec\xd8\x0b\xe0\xfbhw')
'PRIV:WM/WMContentID:\x9d;=#\x00ÛFI\x92ØE9Ãl\x92\x07'  PRIV(owner='WM/WMContentID', data=b'\x9d;=#\x00\xdbFI\x92\xd8E9\xc3l\x92\x07')
'TALB' (Album/Movie/Show title)                     'Illuminated'
'TBPM' (BPM (beats per minute))                     '129.398'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'loc-unsorted'
'TDRC' (Recording time)                             '1996'
'TIT2' (Title/songname/content description)         ("Tzotzil Music Heralding All Saints' Day (Fireworks, Drums, Voices and Bells "
 'on the Night of 31st October - San Pedro Chenalho, Mexico)')
'TKEY' (Initial key)                                '6A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Tzotziles'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Sub Rosa'
'TRCK' (Track number/Position in set)               '3/14'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Tzotzil'
'TXXX:Acoustid Id'                                  'b8f1fd07-080c-4548-9e14-6f730e4fe721'
'TXXX:Artists'                                      'Tzotziles'
'TXXX:BARCODE'                                      '5413356804928'
'TXXX:CATALOGNUMBER'                                'SUB CD 027-49'
'TXXX:MusicBrainz Album Artist Id'                  '89ad4ac3-39f7-470e-963a-56509c546377'
'TXXX:MusicBrainz Album Id'                         '520f430a-8e08-48f8-892e-a6c68ac35dcb'
'TXXX:MusicBrainz Album Release Country'            'BE'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
'TXXX:MusicBrainz Artist Id'                        '34ca2f64-90f8-4108-86aa-7694750dd34a'
'TXXX:MusicBrainz Release Group Id'                 'de377430-838f-42c4-a954-984b58d6f413'
'TXXX:MusicBrainz Release Track Id'                 'bba9ae7c-6acc-3825-8cfd-1bfa66561991'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'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'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.75 dB'
'TXXX:replaygain_track_peak'                        '0.836779'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'732c84e9-981d-4280-8dc2-77a03e338cbd')

========================== row from database ==========================
                                              'id'  1502178
                                            'path'  /data/Music/Bulk/00localcharacter/VA. World 1： Trad/Illuminated (Sub Rosa, 1996) [192k]/03.Tzotzil Music Heralding All Saints_ Day.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  361
                                           'genre'  loc-unsorted
                                        'filesize'  8734563
                                           'mtime'  1621629879
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter VA. World 1： Trad (Sub Rosa, 1996) [192k] 03.Tzotzil Saints_ loc unsorted
                                      'tag_artist'  Tzotziles
                                     'tag_release'  Illuminated
                                       'tag_title'  Tzotzil Music Heralding All Saints' Day (Fireworks, Drums, Voices and Bells on the Night of 31st October - San Pedro Chenalho, Mexico)
                                             'bpm'  129.398
                                    'search_title'  '31st':19 'all':4 'and':13 'bells':14 'chenalho':23,24 'day':7 'drums':10,11 'fireworks':8,9 'heralding':3 'mexico':25,26 'music':2 'night':17 'october':20 'of':18 'on':15 'pedro':22 'saints':5,6 'san':21 'the':16 'tzotzil':1 'voices':12
                                   'search_artist'  'tzotziles':1
                                  'search_release'  'illuminated':1
                                     'search_rest'  '03':16 '03tzotzil':18 '1':4,5,6 '192k':14,15 '1996':12,13 'loc':20 'rosa':10,11 'saints':19 'sub':8,9 'trad':7 'tzotzil':17 'unsorted':21 'va':1,2 'world':3
                                    'search_combo'  '03':44 '03tzotzil':46 '1':32,33,34 '192k':42,43 '1996':40,41 '31st':19A 'all':4A 'and':13A 'bells':14A 'chenalho':23A,24A 'day':7A 'drums':10A,11A 'fireworks':8A,9A 'heralding':3A 'illuminated':28C 'loc':48 'mexico':25A,26A 'music':2A 'night':17A 'october':20A 'of':18A 'on':15A 'pedro':22A 'rosa':38,39 'saints':5A,6A,47 'san':21A 'sub':36,37 'the':16A 'trad':35 'tzotzil':1A,45 'tzotziles':27B 'unsorted':49 'va':29,30 'voices':12A 'world':31
                                    'tag_tracknum'  3
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1996
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621629878.679646  (2021-05-21 22:44:38)
                             'size'  8734563