<pre>
======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '325'
                                          'artist'  'DGM'
                                     'text_people'  '(Music: Mularoni, Basile - Lyrics: Basile)'
                                         'release'  'FrAme'
                                           'title'  'No Looking Back'
                                           '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-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['power metal', 'zzzz', 'metal', 'progressive power metal', 'progressive "
 "metal', 'italian']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '2009'
                                        'comments'  ''
                                           'genre'  'eid-metal-power'
                                             'bpm'  '120.042'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================<mutagen.mp3.MPEGInfo object at 0x7f954215a790>

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''<br/>                                     <img style="width:150px" src="image?fid=1397021"/>
'COMM:ID3v1 Comment:XXX'                            '980B870B+221476+11+150+21388'
'COMM:iTunes_CDDB_1:eng'                            '980B870B+221476+11+150+21388+41025+60638+85013+94118+112322+136219+160875+177850+200752'
'COMM:iTunes_CDDB_TrackNumber:eng'                  '4'
'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)                     'FrAme'
'TBPM' (BPM (beats per minute))                     '120.042'
'TCOM' (Composer)                                   '(Music: Mularoni, Basile - Lyrics: Basile)'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-power'
'TDRC' (Recording time)                             '2009'
'TENC' (Encoded by)                                 'iTunes 8.0.1.11'
'TIT2' (Title/songname/content description)         'No Looking Back'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'DGM'
'TPE2' (Band/orchestra/accompaniment)               'DGM'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '4'
'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'                                   ['power metal',
 'zzzz',
 'metal',
 'progressive power metal',
 'progressive metal',
 'italian']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'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'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.18 dB'
'TXXX:replaygain_track_peak'                        '0.288992'

========================== row from database ==========================
                                              'id'  1397021
                                            'path'  /data/Music/Bulk/00dwimp/00metal/DGM/04 No Looking Back.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  325
                                           'genre'  eid-metal-power
                                        'filesize'  13074646
                                           'mtime'  1620310831
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal 04 eid metal power
                                      'tag_artist'  DGM
                                     'tag_release'  FrAme
                                       'tag_title'  No Looking Back
                                             'bpm'  120.042
                                    'search_title'  'back':3 'looking':2 'no':1
                                   'search_artist'  'dgm':1
                                  'search_release'  'ame':3 'fr':2 'frame':1
                                     'search_rest'  '00dwimp':1 '00metal':2 'eid':3 'metal':4 'power':5
                                    'search_combo'  '00dwimp':8 '00metal':9 'ame':7C 'back':3A 'dgm':4B 'eid':10 'fr':6C 'frame':5C 'looking':2A 'metal':11 'no':1A 'power':12
                                    'tag_tracknum'  4
                                      'num_images'  1
                                             'key'  8A
                                           '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-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-1', 'q-bass-3', 'q-grit-4']
                                      'lastfmtags'  ['power metal', 'zzzz', 'metal', 'progressive power metal', 'progressive metal', 'italian']
                                        'tag_date'  2009
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620310831.1418607  (2021-05-06 16:20:31)
                             'size'  13074646