======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '91'
                                          'artist'  'Bashful Vic Thomas'
                                     'text_people'  ''
                                         'release'  "Desperate Rock'N'Roll Vol.3"
                                           'title'  '"Bashful" Vic Thomas / Rock\'N\'Roll Tonight'
                                           'quals'  ("['Q-OLDST-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-1', "
 "'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['hillbilly']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '22'
                                      'tracktotal'  '30'
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'set-pl-spelling;rock-unsorted'
                                             'bpm'  '111.272'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            '0'
'COMM:iTunNORM:eng'                                 (' 00000DBA 00000DBA 000051CF 000051CE 000094FA 000094FA 00006E24 00006E24 '
 '000114A1 000114A1')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000714 00000000003D8EDC 00000000 002171A2 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '30+1C9A0A56DE59F4548304A9336B851F8E+846939'
'TALB' (Album/Movie/Show title)                     "Desperate Rock'N'Roll Vol.3"
'TBPM' (BPM (beats per minute))                     '111.272'
'TCON' (Content type, a.k.a. Genre)                 ['set-pl-spelling', 'rock-unsorted']
'TENC' (Encoded by)                                 'iTunes 8.0.2'
'TIT2' (Title/songname/content description)         '"Bashful" Vic Thomas / Rock\'N\'Roll Tonight'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'Bashful Vic Thomas'
'TRCK' (Track number/Position in set)               '22/30'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   'hillbilly'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-1.24 dB'
'TXXX:replaygain_track_peak'                        '0.429418'

========================== row from database ==========================
                                              'id'  1497282
                                            'path'  /data/Music/Bulk/0playlists/0novelty themes/spelling/Bashful Vic Thomas - Rock_N_Roll Tonight.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  91
                                           'genre'  set-pl-spelling;rock-unsorted
                                        'filesize'  2199039
                                           'mtime'  1620392916
                                   'redo_metaread'  0
                                        'rest_str'   0playlists 0novelty themes spelling Rock_N_Roll set pl spelling;rock unsorted
                                      'tag_artist'  Bashful Vic Thomas
                                     'tag_release'  Desperate Rock'N'Roll Vol.3
                                       'tag_title'  "Bashful" Vic Thomas / Rock'N'Roll Tonight
                                             'bpm'  111.272
                                    'search_title'  'bashful':1 'n':5 'rock':4 'rocknroll':7 'roll':6 'thomas':3 'tonight':8 'vic':2
                                   'search_artist'  'bashful':1 'thomas':3 'vic':2
                                  'search_release'  '3':7 'desperate':1 'n':3 'rock':2 'rocknroll':5 'roll':4 'vol':6 'vol3':8
                                     'search_rest'  '0novelty':2 '0playlists':1 'n':6 'pl':9 'rock':5,11,13 'roll':7 'set':8 'spelling':4,10,12 'themes':3 'unsorted':14
                                    'search_combo'  '0novelty':21 '0playlists':20 '3':18C 'bashful':1A,9B 'desperate':12C 'n':5A,14C,25 'pl':28 'rock':4A,13C,24,30,32 'rocknroll':7A,16C 'roll':6A,15C,26 'set':27 'spelling':23,29,31 'themes':22 'thomas':3A,11B 'tonight':8A 'unsorted':33 'vic':2A,10B 'vol':17C 'vol3':19C
                                    'tag_tracknum'  22
                                      'num_images'  0
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-1', 'q-other-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['hillbilly']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620392915.5200088  (2021-05-07 15:08:35)
                             'size'  2199039