======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '148'
                                          'artist'  "Lightnin' Slim"
                                     'text_people'  ''
                                         'release'  "I'm Evil: Rare And Unissued Excello Masters, Vol.1"
                                           'title'  "I'm Grown"
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-2', 'Q-JZFKS-3', 'Q-HHRNBTT-1', 'Q-UNU-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['swamp blues', 'blues', 'missouri', 'harmonica']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  '27'
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues;set-pl-spelling'
                                             'bpm'  '144.438'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            '0'
'COMM:iTunNORM:eng'                                 (' 000003A0 000003A0 000040CB 000040CB 00021149 00021149 00008994 00008994 '
 '000157C6 000157C6')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000A68 0000000000641C88 00000000 00366EB2 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '27+44D4CA84F3C9EC7A5F7355F5A8906591+12270'
'TALB' (Album/Movie/Show title)                     "I'm Evil: Rare And Unissued Excello Masters, Vol.1"
'TBPM' (BPM (beats per minute))                     '144.438'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-jb-blues', 'set-pl-spelling']
'TENC' (Encoded by)                                 'iTunes 8.0.2'
'TIT2' (Title/songname/content description)         "I'm Grown"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               "Lightnin' Slim"
'TRCK' (Track number/Position in set)               '9/27'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['swamp blues', 'blues', 'missouri', 'harmonica']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.85 dB'
'TXXX:replaygain_track_peak'                        '0.688585'

========================== row from database ==========================
                                              'id'  1512583
                                            'path'  /data/Music/Bulk/0playlists/0novelty themes/spelling/Lightnin_ Slim - I_m Grown.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  148
                                           'genre'  prerock-jb-blues;set-pl-spelling
                                        'filesize'  3574518
                                           'mtime'  1620356373
                                   'redo_metaread'  0
                                        'rest_str'   0playlists 0novelty themes spelling Lightnin_ I_m prerock jb blues;set pl spelling
                                      'tag_artist'  Lightnin' Slim
                                     'tag_release'  I'm Evil: Rare And Unissued Excello Masters, Vol.1
                                       'tag_title'  I'm Grown
                                             'bpm'  144.438
                                    'search_title'  'grown':4 'i':1 'im':3 'm':2
                                   'search_artist'  'lightnin':1,2 'slim':3
                                  'search_release'  '1':13 'and':7 'evil':4,5 'excello':9 'i':1 'im':3 'm':2 'masters':10,11 'rare':6 'unissued':8 'vol':12 'vol1':14
                                     'search_rest'  '0novelty':2 '0playlists':1 'blues':10,12 'i':6 'jb':9 'lightnin':5 'm':7 'pl':14 'prerock':8 'set':11,13 'spelling':4 'themes':3
                                    'search_combo'  '0novelty':23 '0playlists':22 '1':20C 'and':14C 'blues':31,33 'evil':11C,12C 'excello':16C 'grown':4A 'i':1A,8C,27 'im':3A,10C 'jb':30 'lightnin':5B,6B,26 'm':2A,9C,28 'masters':17C,18C 'pl':35 'prerock':29 'rare':13C 'set':32,34 'slim':7B 'spelling':25 'themes':24 'unissued':15C 'vol':19C 'vol1':21C
                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-3', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['swamp blues', 'blues', 'missouri', 'harmonica']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620356372.516764  (2021-05-07 04:59:32)
                             'size'  3574518