<pre>
======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '185'
                                          'artist'  'Suicidal Angels'
                                     'text_people'  ''
                                         'release'  'Eternal Domination'
                                           'title'  'Sacred Prayers to Expiation'
                                           'quals'  ("['Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-LOCALNESS-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-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['greek', 'speed metal', 'thrash metal', 'metal', 'old school thrash metal']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  ''
                                            'date'  '2007'
                                        'comments'  ''
                                           'genre'  'eid-metal'
                                             'bpm'  '91.8'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================<mutagen.mp3.MPEGInfo object at 0x7f95382dac40>

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''<br/>                                     <img style="width:150px" src="image?fid=1400533"/>
'PRIV:AverageLevel:Ö\x1f\x00\x00'                   PRIV(owner='AverageLevel', data=b'\xd6\x1f\x00\x00')
'PRIV:PeakValue:ÿ\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xff\x7f\x00\x00')
'PRIV:WM/MediaClassPrimaryID:¼}`Ñ#ãâK\x86¡H¤*(D\x1e'  PRIV(owner='WM/MediaClassPrimaryID', data=b'\xbc}`\xd1#\xe3\xe2K\x86\xa1H\xa4*(D\x1e')
'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')
'TALB' (Album/Movie/Show title)                     'Eternal Domination'
'TBPM' (BPM (beats per minute))                     '91.8'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal'
'TDRC' (Recording time)                             '2007'
'TIT2' (Title/songname/content description)         'Sacred Prayers to Expiation'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Suicidal Angels'
'TRCK' (Track number/Position in set)               '6'
'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'                                   ['greek', 'speed metal', 'thrash metal', 'metal', 'old school thrash metal']
'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'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.88 dB'
'TXXX:replaygain_track_peak'                        '0.443714'

========================== row from database ==========================
                                              'id'  1400533
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Suicidal Angels/Eternal Domination/06. Sacred Prayers to Expiation.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  185
                                           'genre'  eid-metal
                                        'filesize'  7448700
                                           'mtime'  1620301424
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal 06. eid metal
                                      'tag_artist'  Suicidal Angels
                                     'tag_release'  Eternal Domination
                                       'tag_title'  Sacred Prayers to Expiation
                                             'bpm'  91.8
                                    'search_title'  'expiation':4 'prayers':2 'sacred':1 'to':3
                                   'search_artist'  'angels':2 'suicidal':1
                                  'search_release'  'domination':2 'eternal':1
                                     'search_rest'  '00dwimp':1 '00metal':2 '06':3,4 'eid':5 'metal':6
                                    'search_combo'  '00dwimp':9 '00metal':10 '06':11,12 'angels':6B 'domination':8C 'eid':13 'eternal':7C 'expiation':4A 'metal':14 'prayers':2A 'sacred':1A 'suicidal':5B 'to':3A
                                    'tag_tracknum'  6
                                      'num_images'  1
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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'  ['greek', 'speed metal', 'thrash metal', 'metal', 'old school thrash metal']
                                        'tag_date'  2007
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620301423.728876  (2021-05-06 13:43:43)
                             'size'  7448700