<pre>
======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '155'
                                          'artist'  'The Brian Setzer Orchestra'
                                     'text_people'  'Steve Allen'
                                         'release'  'Dig That Crazy Christmas'
                                           'title'  'Cool Yule'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-1', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', 'big band', 'rock', 'rockabilly', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  '13'
                                            'date'  '2005'
                                        'comments'  ''
                                           'genre'  'rock-rockabilly or psychobilly;set-th-christmas'
                                             'bpm'  '84.809'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================<mutagen.mp3.MPEGInfo object at 0x7f95382f1cd0>

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''<br/>                                     <img style="width:150px" src="image?fid=1329993"/>
'COMM:ID3v1 Comment:XXX'                            ' 0000139F 00001758 0000D5FC'
'COMM:iTunNORM:eng'                                 (' 0000139F 00001758 0000D5FC 0000D80A 0001D0CB 0001D0CB 00008492 00008777 '
 '00003F5E 0000E5E5')
'COMM:iTunes_CDDB_1:eng'                            'A60A700D+200611+13+150+10268+29895+46010+70188+79829+94308+112977+130911+142781+154431+166193+184594'
'COMM:iTunes_CDDB_TrackNumber:eng'                  '10'
'TALB' (Album/Movie/Show title)                     'Dig That Crazy Christmas'
'TBPM' (BPM (beats per minute))                     '84.809'
'TCOM' (Composer)                                   'Steve Allen'
'TCON' (Content type, a.k.a. Genre)                 ['rock-rockabilly or psychobilly', 'set-th-christmas']
'TDRC' (Recording time)                             '2005'
'TENC' (Encoded by)                                 'iTunes v4.9'
'TIT2' (Title/songname/content description)         'Cool Yule'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Brian Setzer Orchestra'
'TRCK' (Track number/Position in set)               '10/13'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['jazz', 'big band', 'rock', 'rockabilly', 'swing']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.90 dB'
'TXXX:replaygain_track_peak'                        '0.396016'

========================== row from database ==========================
                                              'id'  1329993
                                            'path'  /data/Music/Bulk/00poprockelectronic/Brian Setzer Orchestra/Dig That Crazy Christmas/10 Cool Yule.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  155
                                           'genre'  rock-rockabilly or psychobilly;set-th-christmas
                                        'filesize'  3751127
                                           'mtime'  1620525690
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 10 rock rockabilly or psychobilly;set th christmas
                                      'tag_artist'  The Brian Setzer Orchestra
                                     'tag_release'  Dig That Crazy Christmas
                                       'tag_title'  Cool Yule
                                             'bpm'  84.809
                                    'search_title'  'cool':1 'yule':2
                                   'search_artist'  'brian':2 'orchestra':4 'setzer':3 'the':1
                                  'search_release'  'christmas':4 'crazy':3 'dig':1 'that':2
                                     'search_rest'  '00poprockelectronic':1 'christmas':10 'or':4 'psychobilly':5,7 'rock':2 'rockabilly':3 'set':6,8 'th':9
                                    'search_combo'  '00poprockelectronic':11 'brian':4B 'christmas':10C,20 'cool':1A 'crazy':9C 'dig':7C 'or':14 'orchestra':6B 'psychobilly':15,17 'rock':12 'rockabilly':13 'set':16,18 'setzer':5B 'th':19 'that':8C 'the':3B 'yule':2A
                                    'tag_tracknum'  10
                                      'num_images'  1
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['jazz', 'big band', 'rock', 'rockabilly', 'swing']
                                        'tag_date'  2005
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620525689.9265223  (2021-05-09 04:01:29)
                             'size'  3751127