======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '129'
                                          'artist'  'Hatebreed'
                                     'text_people'  ''
                                         'release'  'Under the Knife'
                                           'title'  'Not One Truth'
                                           'quals'  ("['Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-3', 'q-play-2', "
 "'q-chart-3', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['cover', 'metal', 'moshcore', 'metalcore', 'hardcore', 'death metal']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'eid-metal'
                                             'bpm'  '87'
                                             'key'  '4B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
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'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')
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'PRIV:WM/WMCollectionGroupID:H=\x82\x9e\x98gîN©\x99\xadUÐæTP'  PRIV(owner='WM/WMCollectionGroupID', data=b'H=\x82\x9e\x98g\xeeN\xa9\x99\xadU\xd0\xe6TP')
'PRIV:WM/WMCollectionID:H=\x82\x9e\x98gîN©\x99\xadUÐæTP'  PRIV(owner='WM/WMCollectionID', data=b'H=\x82\x9e\x98g\xeeN\xa9\x99\xadU\xd0\xe6TP')
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'TALB' (Album/Movie/Show title)                     'Under the Knife'
'TBPM' (BPM (beats per minute))                     '87'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'Not One Truth'
'TKEY' (Initial key)                                '4B'
'TLEN' (Length)                                     '129724'
'TPE1' (Lead performer(s)/Soloist(s))               'Hatebreed'
'TPE2' (Band/orchestra/accompaniment)               'Hatebreed'
'TPUB' (Publisher)                                  'Victory'
'TRCK' (Track number/Position in set)               '5'
'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:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['cover', 'metal', 'moshcore', 'metalcore', 'hardcore', 'death metal']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.97 dB'
'TXXX:replaygain_track_peak'                        '0.616684'

========================== row from database ==========================
                                              'id'  1390858
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Hatebreed/Under the Knife/Hatebreed-Not One Truth.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  129
                                           'genre'  eid-metal
                                        'filesize'  5203840
                                           'mtime'  1620300776
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal eid metal
                                      'tag_artist'  Hatebreed
                                     'tag_release'  Under the Knife
                                       'tag_title'  Not One Truth
                                             'bpm'  87.0
                                    'search_title'  'not':1 'one':2 'truth':3
                                   'search_artist'  'hatebreed':1
                                  'search_release'  'knife':3 'the':2 'under':1
                                     'search_rest'  '00dwimp':1 '00metal':2 'eid':3 'metal':4
                                    'search_combo'  '00dwimp':8 '00metal':9 'eid':10 'hatebreed':4B 'knife':7C 'metal':11 'not':1A 'one':2A 'the':6C 'truth':3A 'under':5C
                                    'tag_tracknum'  5
                                      'num_images'  1
                                             'key'  4B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-3', 'q-other-2', 'Q-HAP-1', 'q-bass-4', 'q-grit-3']
                                      'lastfmtags'  ['cover', 'metal', 'moshcore', 'metalcore', 'hardcore', 'death metal']
                                        'tag_date'  2000
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620300776.3522904  (2021-05-06 13:32:56)
                             'size'  5203840