<pre>
======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '247'
                                          'artist'  'Primordial'
                                     'text_people'  ''
                                         'release'  'Spirit the Earth Aflame'
                                           'title'  'The Cruel Sea'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-4', 'q-play-3', "
 "'q-chart-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['folk metal', 'doom metal', 'black metal', 'pagan metal', 'irish']"
                                     'discogstags'  "['black metal', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  '8'
                                            'date'  '2010'
                                        'comments'  ''
                                           'genre'  'eid-metal-black'
                                             'bpm'  '86'
                                             'key'  '12B'
                                        'acoustid'  '504b0d56-1e15-4415-babe-504966c93056'
rest: ''

======================== rawer (from filesystem) ========================<mutagen.mp3.MPEGInfo object at 0x7f95382f1820>

'POPM:Windows Media Player 9 Series'                POPM(email='Windows Media Player 9 Series', rating=128, count=0)
'TALB' (Album/Movie/Show title)                     'Spirit the Earth Aflame'
'TBPM' (BPM (beats per minute))                     '86'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-black'
'TDOR' (Original release time)                      '2000'
'TDRC' (Recording time)                             '2010-06-02'
'TIT2' (Title/songname/content description)         'The Cruel Sea'
'TKEY' (Initial key)                                '12B'
'TLAN' (Language(s))                                'Instrumental'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Primordial'
'TPE2' (Band/orchestra/accompaniment)               'Primordial'
'TPOS' (Part of a set)                              '1/2'
'TPUB' (Publisher)                                  'Metal Blade Records GmbH'
'TRCK' (Track number/Position in set)               '6/8'
'TSO2'                                              'Primordial'
'TSOP' (Performer sort order)                       'Primordial'
'TXXX:ADDED'                                        '2014-12-01'
'TXXX:ALBUMNAME'                                    'Spirit the Earth Aflame'
'TXXX:ASIN'                                         'B003N7G8PI'
'TXXX:Acoustid Id'                                  '504b0d56-1e15-4415-babe-504966c93056'
'TXXX:BARCODE'                                      '039841486520'
'TXXX:CATALOGNR'                                    'HHR 063'
'TXXX:CATALOGNUMBER'                                '3984-14865-2'
'TXXX:COUNTRY'                                      'Ireland'
'TXXX:ERA'                                          '2000s'
'TXXX:ERA_ID'                                       '3754497983'
'TXXX:FINGERPRINT_FOOID'                            '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'
'TXXX:FIRST_PLAYED'                                 '2014-12-01 19:38:49'
'TXXX:FOO_ALBUM_ID'                                 '3810537534'
'TXXX:FOO_ARTIST_ID'                                '1598257478'
'TXXX:FOO_ID'                                       '2245744021'
'TXXX:GENRE_ID'                                     '3014719805'
'TXXX:Lastfm RATING'                                '4'
'TXXX:MusicBrainz Album Artist Id'                  'eacf66a8-8ea0-41e4-879e-fcc61bcb03f0'
'TXXX:MusicBrainz Album Id'                         '6715ae5e-5280-4db9-a88e-30d14f47811b'
'TXXX:MusicBrainz Album Release Country'            'DE'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        'eacf66a8-8ea0-41e4-879e-fcc61bcb03f0'
'TXXX:PLAY_COUNTER'                                 '1'
'TXXX:PLAY_STAMP'                                   '2014-12-01 19:38:49'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:STYLE_ID'                                     '3227710665'
'TXXX:biography'                                    ('        Primordial is a folk metal / pagan black metal band founded in 1987 '
 'in Skerries, County Dublin, Ireland. They play a unique style of pagan '
 'metal, which can best be described as a blend of black and celtic folk metal '
 'with strong influences from their Irish roots. Their lyrics deal with '
 'cultural heritage, history and struggle.  Primordial started out as a black '
 'metal band with some folk influences with their 1993 demo "Dark Romanticism" '
 'and 1995 debut album "Imrama".          Read more about Primordial on '
 'Last.fm.           User-contributed text is available under the Creative '
 'Commons By-SA License and may also be available under the GNU FDL.')
'TXXX:discogstags'                                  ['black metal', 'rock']
'TXXX:lastfm LISTENERS'                             '9400'
'TXXX:lastfm PLAY COUNT'                            '39592'
'TXXX:lastfmtags'                                   ['folk metal', 'doom metal', 'black metal', 'pagan metal', 'irish']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-2.27 dB'
'TXXX:replaygain_track_peak'                        '0.796266'
'TXXX:similar artist'                               'Mael Mórdha'
'TXXX:style'                                        'Metal'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'2114e099-d389-49d6-8436-6fda3b5da4ff')

========================== row from database ==========================
                                              'id'  1396254
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Primordial - 2000 Spirit the Earth Aflame/06. The Cruel Sea.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  247
                                           'genre'  eid-metal-black
                                        'filesize'  9910175
                                           'mtime'  1620301766
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal 2000 06. eid metal black
                                      'tag_artist'  Primordial
                                     'tag_release'  Spirit the Earth Aflame
                                       'tag_title'  The Cruel Sea
                                             'bpm'  86.0
                                    'search_title'  'cruel':2 'sea':3 'the':1
                                   'search_artist'  'primordial':1
                                  'search_release'  'aflame':4 'earth':3 'spirit':1 'the':2
                                     'search_rest'  '00dwimp':1 '00metal':2 '06':4,5 '2000':3 'black':8 'eid':6 'metal':7
                                    'search_combo'  '00dwimp':9 '00metal':10 '06':12,13 '2000':11 'aflame':8C 'black':16 'cruel':2A 'earth':7C 'eid':14 'metal':15 'primordial':4B 'sea':3A 'spirit':5C 'the':1A,6C
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-1', 'q-bass-3', 'q-grit-4']
                                      'lastfmtags'  ['folk metal', 'doom metal', 'black metal', 'pagan metal', 'irish']
                                        'tag_date'  2010
                                     'discogstags'  ['black metal', 'rock']

============================== file details ==============================
                                           'mtime'  1620301766.0079954  (2021-05-06 13:49:26)
                             'size'  9910175