======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '286'
                                          'artist'  'Lamb Of God'
                                     'text_people'  ('David Randall "Randy" Blythe, John Steven Campbell, Mark Duane Morton, '
 'Christopher James Adler, William M. Adler')
                                         'release'  'Resolution'
                                           'title'  'The Undertow'
                                           '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-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['metalcore', 'thrash metal', 'metal', 'death metal', 'groove metal']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  '14'
                                            'date'  '2012'
                                        'comments'  ''
                                           'genre'  'eid-metal-death'
                                             'bpm'  '121.701'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 00003087 000034EA 0000B303'
'COMM:iTunNORM:eng'                                 (' 00003087 000034EA 0000B303 0000D26B 000313C1 00030614 00007FFF 00007FFF '
 '00000534 00000534')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000AC8 0000000000C11028 00000000 00AF082A 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'TALB' (Album/Movie/Show title)                     'Resolution'
'TBPM' (BPM (beats per minute))                     '121.701'
'TCOM' (Composer)                                   ('David Randall "Randy" Blythe, John Steven Campbell, Mark Duane Morton, '
 'Christopher James Adler, William M. Adler')
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-death'
'TDRC' (Recording time)                             '2012'
'TENC' (Encoded by)                                 'iTunes 10.5.0.142'
'TIT2' (Title/songname/content description)         'The Undertow'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Lamb Of God'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '5/14'
'TSOA' (Album sort order)                           'Resolution'
'TSOC'                                              ('David Randall "Randy" Blythe, John Steven Campbell, Mark Duane Morton, '
 'Christopher James Adler, William M. Adler')
'TSOP' (Performer sort order)                       'Lamb Of God'
'TSOT' (Title sort order)                           'The Undertow'
'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'                                   ['metalcore', 'thrash metal', 'metal', 'death metal', 'groove metal']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '-1.52 dB'
'TXXX:replaygain_track_peak'                        '0.313918'

========================== row from database ==========================
                                              'id'  1396587
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Lamb Of God/Resolution/05 The Undertow.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  286
                                           'genre'  eid-metal-death
                                        'filesize'  11640658
                                           'mtime'  1620302072
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal 05 eid metal death
                                      'tag_artist'  Lamb Of God
                                     'tag_release'  Resolution
                                       'tag_title'  The Undertow
                                             'bpm'  121.701
                                    'search_title'  'the':1 'undertow':2
                                   'search_artist'  'god':3 'lamb':1 'of':2
                                  'search_release'  'resolution':1
                                     'search_rest'  '00dwimp':1 '00metal':2 'death':5 'eid':3 'metal':4
                                    'search_combo'  '00dwimp':7 '00metal':8 'death':11 'eid':9 'god':5B 'lamb':3B 'metal':10 'of':4B 'resolution':6C 'the':1A 'undertow':2A
                                    'tag_tracknum'  5
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-1', 'q-bass-3', 'q-grit-4']
                                      'lastfmtags'  ['metalcore', 'thrash metal', 'metal', 'death metal', 'groove metal']
                                        'tag_date'  2012
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620302071.6121087  (2021-05-06 13:54:31)
                             'size'  11640658