======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '197'
                                          'artist'  'Bo Diddley'
                                     'text_people'  'Bo Diddley'
                                         'release'  "I'm a Man - The Chess Masters, 1955-1958 [Disc 1]"
                                           'title'  "I'm Bad"
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-1', "
 "'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-2']")
                                      'lastfmtags'  "['rock and roll', 'blues', 'rhythm and blues', 'soul', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '20'
                                      'tracktotal'  '24'
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'set-pl-spelling;rock-pop-early-blues'
                                             'bpm'  '84.561'
                                             'key'  '5B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            '0'
'COMM:iTunNORM:eng'                                 (' 00000CCF 00000E75 0000FBF4 000129B5 0001EF9C 0001EF9C 00007FAA 00008334 '
 '0001B5F5 00002129')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000B34 0000000000851EBC 00000000 004865E1 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '24+39E2A6E77F34E352AA9B881882CA413E+9868540'
'TALB' (Album/Movie/Show title)                     "I'm a Man - The Chess Masters, 1955-1958 [Disc 1]"
'TBPM' (BPM (beats per minute))                     '84.561'
'TCOM' (Composer)                                   'Bo Diddley'
'TCON' (Content type, a.k.a. Genre)                 ['set-pl-spelling', 'rock-pop-early-blues']
'TDRC' (Recording time)                             '1956'
'TENC' (Encoded by)                                 'iTunes 8.0.2'
'TIT2' (Title/songname/content description)         "I'm Bad"
'TKEY' (Initial key)                                '5B'
'TPE1' (Lead performer(s)/Soloist(s))               'Bo Diddley'
'TPOS' (Part of a set)                              '1/2'
'TRCK' (Track number/Position in set)               '20/24'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['rock and roll', 'blues', 'rhythm and blues', 'soul', 'rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.46 dB'
'TXXX:replaygain_track_peak'                        '0.365009'

========================== row from database ==========================
                                              'id'  1518669
                                            'path'  /data/Music/Bulk/0playlists/0novelty themes/spelling/Bo Diddley - I_m Bad.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  197
                                           'genre'  set-pl-spelling;rock-pop-early-blues
                                        'filesize'  4751945
                                           'mtime'  1620736813
                                   'redo_metaread'  0
                                        'rest_str'   0playlists 0novelty themes spelling I_m set pl spelling;rock pop early blues
                                      'tag_artist'  Bo Diddley
                                     'tag_release'  I'm a Man - The Chess Masters, 1955-1958 [Disc 1]
                                       'tag_title'  I'm Bad
                                             'bpm'  84.561
                                    'search_title'  'bad':4 'i':1 'im':3 'm':2
                                   'search_artist'  'bo':1 'diddley':2
                                  'search_release'  '1':15,16 '1955':10 '19551958':12 '1958':11 'a':4 'chess':7 'disc':13,14 'i':1 'im':3 'm':2 'man':5 'masters':8,9 'the':6
                                     'search_rest'  '0novelty':2 '0playlists':1 'blues':15 'early':14 'i':5 'm':6 'pl':8 'pop':13 'rock':10,12 'set':7 'spelling':4,9,11 'themes':3
                                    'search_combo'  '0novelty':24 '0playlists':23 '1':21C,22C '1955':16C '19551958':18C '1958':17C 'a':10C 'bad':4A 'blues':37 'bo':5B 'chess':13C 'diddley':6B 'disc':19C,20C 'early':36 'i':1A,7C,27 'im':3A,9C 'm':2A,8C,28 'man':11C 'masters':14C,15C 'pl':30 'pop':35 'rock':32,34 'set':29 'spelling':26,31,33 'the':12C 'themes':25
                                    'tag_tracknum'  20
                                      'num_images'  0
                                             'key'  5B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-4', 'q-syn-1', 'q-chart-1', 'q-other-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['rock and roll', 'blues', 'rhythm and blues', 'soul', 'rock']
                                        'tag_date'  1956
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620736812.852034  (2021-05-11 14:40:12)
                             'size'  4751945