<pre>
======================== unified (from filesystem) ========================
                                         'bitrate'  '147.626'
                                        'duration'  '231'
                                          'artist'  'Dubmatix'
                                     'text_people'  ''
                                         'release'  'System Shakedown'
                                           'title'  'System Breakdown (feat. Gregory Isaacs)'
                                           'quals'  ("['Q-HAP-3', 'Q-OLDST-3', 'Q-JZFKS-3', 'Q-UNU-2', 'Q-HHRNBTT-2', "
 "'Q-LOCALNESS-3', 'q-syn-2', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-1', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['reggae', 'dub', 'roots reggae', 'canadian']"
                                     'discogstags'  "['dub']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  '13'
                                            'date'  '2010'
                                        'comments'  ''
                                           'genre'  'loc-style-reggae or dub or ska or dancehall-dub-modern'
                                             'bpm'  '150'
                                             'key'  '8B'
                                        'acoustid'  '0cdec097-be87-4f58-9dad-b715004c7faf'
rest: ''

======================== rawer (from filesystem) ========================<mutagen.mp3.MPEGInfo object at 0x7f9537d75c40>

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''<br/>                                     <img style="width:150px" src="image?fid=1382499"/>
'TALB' (Album/Movie/Show title)                     'System Shakedown'
'TBPM' (BPM (beats per minute))                     '150'
'TCON' (Content type, a.k.a. Genre)                 'loc-style-reggae or dub or ska or dancehall-dub-modern'
'TDOR' (Original release time)                      '2010'
'TIT2' (Title/songname/content description)         'System Breakdown (feat. Gregory Isaacs)'
'TKEY' (Initial key)                                '8B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Dubmatix'
'TPE2' (Band/orchestra/accompaniment)               'Dubmatix'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Renegade Rocker'
'TRCK' (Track number/Position in set)               '10/13'
'TSO2'                                              'Dubmatix'
'TSOP' (Performer sort order)                       'Dubmatix'
'TXXX:Acoustid Id'                                  '0cdec097-be87-4f58-9dad-b715004c7faf'
'TXXX:Artists'                                      'Dubmatix'
'TXXX:DATE'                                         '2010'
'TXXX:MusicBrainz Album Artist Id'                  '398d8aef-7939-4d64-b9ee-3b1114836d44'
'TXXX:MusicBrainz Album Id'                         'e0c0914b-5203-4f5a-8537-4bfff51bd60b'
'TXXX:MusicBrainz Album Release Country'            'CA'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '398d8aef-7939-4d64-b9ee-3b1114836d44'
'TXXX:MusicBrainz Release Group Id'                 '52f906b4-c013-4e57-a74d-2873203f300b'
'TXXX:MusicBrainz Release Track Id'                 '87202ca9-19bd-351e-8fd6-2bf6a47177dc'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '2'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  'dub'
'TXXX:lastfmtags'                                   ['reggae', 'dub', 'roots reggae', 'canadian']
'TXXX:originalyear'                                 '2010'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.37 dB'
'TXXX:replaygain_track_peak'                        '0.745260'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'd8e21f4f-272e-4f7c-a835-7e74b6721456')

========================== row from database ==========================
                                              'id'  1382499
                                            'path'  /data/Music/Bulk/00localcharacter/00reggae-dub/Dubmatix - System Shakedown/10 - Dubmatix - System Breakdown (ft Gregory Isaacs).mp3
                                         'working'  None
                                         'bitrate'  147
                                    'duration_sec'  231
                                           'genre'  loc-style-reggae or dub or ska or dancehall-dub-modern
                                        'filesize'  4357981
                                           'mtime'  1620521361
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00reggae dub 10 (ft loc style reggae dub ska dancehall dub modern
                                      'tag_artist'  Dubmatix
                                     'tag_release'  System Shakedown
                                       'tag_title'  System Breakdown (feat. Gregory Isaacs)
                                             'bpm'  150.0
                                    'search_title'  'breakdown':2 'feat':3,4 'gregory':5 'isaacs':6,7 'system':1
                                   'search_artist'  'dubmatix':1
                                  'search_release'  'shakedown':2 'system':1
                                     'search_rest'  '00reggae':1 'dancehall':9 'dub':2 'ft':3,4 'loc':5 'modern':10 'reggae':7 'ska':8 'style':6
                                    'search_combo'  '00reggae':11 'breakdown':2A 'dancehall':19 'dub':12 'dubmatix':8B 'feat':3A,4A 'ft':13,14 'gregory':5A 'isaacs':6A,7A 'loc':15 'modern':20 'reggae':17 'shakedown':10C 'ska':18 'style':16 'system':1A,9C
                                    'tag_tracknum'  10
                                      'num_images'  1
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-2', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['reggae', 'dub', 'roots reggae', 'canadian']
                                        'tag_date'  2010
                                     'discogstags'  ['dub']

============================== file details ==============================
                                           'mtime'  1620521361.3903944  (2021-05-09 02:49:21)
                             'size'  4357981