======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '305'
                                          'artist'  'Megadeth'
                                     'text_people'  ''
                                         'release'  'Countdown to extinction'
                                           'title'  'Sweating bullets'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['thrash', 'speed metal', 'thrash metal', 'metal', 'heavy metal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  '11'
                                            'date'  '1990'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted;eid-metal'
                                             'bpm'  '98.790'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 00001262 00000600 0000F7BB'
'COMM:iTunNORM:eng'                                 (' 00001262 00000600 0000F7BB 000054F7 0001634E 0002167D 00008231 00008136 '
 '0000CB5E 00046B87')
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 000008E8 0000000000CD7B08 00000000 00000000 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_1:eng'                            '9B0B370B+215480+11+150+19408+47370+62083+80423+96678+116118+139020+155823+175235+194320'
'COMM:iTunes_CDDB_TrackNumber:eng'                  '7'
'TALB' (Album/Movie/Show title)                     'Countdown to extinction'
'TBPM' (BPM (beats per minute))                     '98.790'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-unsorted', 'eid-metal']
'TDRC' (Recording time)                             '1990'
'TENC' (Encoded by)                                 'iTunes v6.0.2.23'
'TIT2' (Title/songname/content description)         'Sweating bullets'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Megadeth'
'TRCK' (Track number/Position in set)               '5/11'
'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:lastfmtags'                                   ['thrash', 'speed metal', 'thrash metal', 'metal', 'heavy metal']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'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'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+19.30 dB'
'TXXX:replaygain_track_peak'                        '0.065044'

========================== row from database ==========================
                                              'id'  1351506
                                            'path'  /data/Music/Bulk/00poprockelectronic/90s/05 Sweating bullets.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  305
                                           'genre'  electronic-generic or radio-unsorted;eid-metal
                                        'filesize'  6118032
                                           'mtime'  1620301730
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 90s 05 electronic generic or radio unsorted;eid metal
                                      'tag_artist'  Megadeth
                                     'tag_release'  Countdown to extinction
                                       'tag_title'  Sweating bullets
                                             'bpm'  98.79
                                    'search_title'  'bullets':2 'sweating':1
                                   'search_artist'  'megadeth':1
                                  'search_release'  'countdown':1 'extinction':3 'to':2
                                     'search_rest'  '00poprockelectronic':1 '90s':2 'eid':8,10 'electronic':3 'generic':4 'metal':11 'or':5 'radio':6 'unsorted':7,9
                                    'search_combo'  '00poprockelectronic':7 '90s':8 'bullets':2A 'countdown':4C 'eid':14,16 'electronic':9 'extinction':6C 'generic':10 'megadeth':3B 'metal':17 'or':11 'radio':12 'sweating':1A 'to':5C 'unsorted':13,15
                                    'tag_tracknum'  5
                                      'num_images'  1
                                             'key'  9A
                                           '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-4', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-1', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['thrash', 'speed metal', 'thrash metal', 'metal', 'heavy metal']
                                        'tag_date'  1990
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620301730.276318  (2021-05-06 13:48:50)
                             'size'  6118032