<pre>
======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '242'
                                          'artist'  'The Exploited'
                                     'text_people'  ''
                                         'release'  'The Massacre'
                                           'title'  'Sick Bastard'
                                           'quals'  ("['Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', 'Q-UNU-2', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-2', 'q-mixbeat-2']")
                                      'lastfmtags'  "['punk rock', 'street punk', 'punk', 'hardcore punk', 'hardcore']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  '12'
                                            'date'  '1990'
                                        'comments'  ''
                                           'genre'  'rock-gr-punk'
                                             'bpm'  '124.852'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================<mutagen.mp3.MPEGInfo object at 0x7f9537d75ac0>

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''<br/>                                     <img style="width:150px" src="image?fid=1327998"/>
'COMM:ID3v1 Comment:XXX'                            ' 00000A76 00000953 00003B5B'
'COMM:iTunNORM:eng'                                 (' 00000A76 00000953 00003B5B 000051A3 0001CB23 0001C2B3 00005D74 000066E4 '
 '00012012 00013E2F')
'MCDI' (Music CD identifier)                        MCDI(data=b'C\x00+\x009\x006\x00+\x003\x008\x002\x004\x00+\x007\x00F\x007\x00C\x00+\x00B\x008\x00E\x001\x00+\x00F\x00B\x00B\x00D\x00+\x001\x004\x002\x000\x001\x00+\x001\x007\x009\x00A\x001\x00+\x001\x00C\x009\x002\x006\x00+\x002\x000\x002\x00D\x00D\x00+\x002\x004\x001\x00D\x004\x00+\x002\x008\x00E\x000\x00A\x00+\x002\x00D\x003\x003\x00C\x00+\x003\x001\x002\x007\x00A\x00\x00\x00')
'TALB' (Album/Movie/Show title)                     'The Massacre'
'TBPM' (BPM (beats per minute))                     '124.852'
'TCON' (Content type, a.k.a. Genre)                 'rock-gr-punk'
'TDRC' (Recording time)                             '1990'
'TIT2' (Title/songname/content description)         'Sick Bastard'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Exploited'
'TPE2' (Band/orchestra/accompaniment)               'The Exploited'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '2/12'
'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'                                   ['punk rock', 'street punk', 'punk', 'hardcore punk', 'hardcore']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.36 dB'
'TXXX:replaygain_track_peak'                        '0.477974'

========================== row from database ==========================
                                              'id'  1327998
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/02 sixk bastard.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  242
                                           'genre'  rock-gr-punk
                                        'filesize'  3923716
                                           'mtime'  1636912540
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] 02 sixk bastard rock gr punk
                                      'tag_artist'  The Exploited
                                     'tag_release'  The Massacre
                                       'tag_title'  Sick Bastard
                                             'bpm'  124.852
                                    'search_title'  'bastard':2 'sick':1
                                   'search_artist'  'exploited':2 'the':1
                                  'search_release'  'massacre':2 'the':1
                                     'search_rest'  '00poprockelectronic':1 'bastard':8 'files':5,6 'gr':10 'loose':3,4 'punk':11 'rock':9 'sixk':7 'unsorted':2
                                    'search_combo'  '00poprockelectronic':7 'bastard':2A,14 'exploited':4B 'files':11,12 'gr':16 'loose':9,10 'massacre':6C 'punk':17 'rock':15 'sick':1A 'sixk':13 'the':3B,5C 'unsorted':8
                                    'tag_tracknum'  2
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['punk rock', 'street punk', 'punk', 'hardcore punk', 'hardcore']
                                        'tag_date'  1990
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1636912539.9034483  (2021-11-14 18:55:39)
                             'size'  3923716