======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '188'
                                          'artist'  'Ink Spots'
                                     'text_people'  ''
                                         'release'  'Whispering Grass'
                                           'title'  "Mamma Don't Allow It (Don't 'Low No Swinging In Here)"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', 'swing', '40s', 'vocal jazz', 'oldies']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  '22'
                                            'date'  '1996'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '116.320'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            ' 000000B1 000000B1 00000F3E'
'COMM:iTunNORM:eng'                                 (' 000000B1 000000B1 00000F3E 00000F3E 0000796D 0000796D 00006EF0 00006EF0 '
 '0000796D 0000796D')
'COMM:iTunes_CDDB_IDs:eng'                          '22+F07D7A442F235F4A3D5DCE95C5E496C5+906816'
'TALB' (Album/Movie/Show title)                     'Whispering Grass'
'TBPM' (BPM (beats per minute))                     '116.320'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1996'
'TENC' (Encoded by)                                 'iTunes v4.7.1.30'
'TIT2' (Title/songname/content description)         "Mamma Don't Allow It (Don't 'Low No Swinging In Here)"
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'Ink Spots'
'TPE2' (Band/orchestra/accompaniment)               'Ink Spots'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '5/22'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['jazz', 'swing', '40s', 'vocal jazz', 'oldies']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.36 dB'
'TXXX:replaygain_track_peak'                        '0.729573'

========================== row from database ==========================
                                              'id'  1517666
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Whispering Grass/05 Mamma Don_t Allow It (Don_t _Low No Swinging In Here).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  188
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  4524352
                                           'mtime'  1620537251
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 05 Don_t (Don_t _Low prerock jb jazz unsorted
                                      'tag_artist'  Ink Spots
                                     'tag_release'  Whispering Grass
                                       'tag_title'  Mamma Don't Allow It (Don't 'Low No Swinging In Here)
                                             'bpm'  116.32
                                    'search_title'  'allow':5 'don':2,7 'dont':4 'here':14,15 'in':13 'it':6 'low':9,10 'mamma':1 'no':11 'swinging':12 't':3,8
                                   'search_artist'  'ink':1 'spots':2
                                  'search_release'  'grass':2 'whispering':1
                                     'search_rest'  'country':4 'don':5,7 'exotica':2 'jazz':1 'jb':11 'low':9 'oldies':3 'prerock':10 't':6,8 'unsorted':12
                                    'search_combo'  'allow':5A 'country':23 'don':2A,7A,24,26 'dont':4A 'exotica':21 'grass':19C 'here':14A,15A 'in':13A 'ink':16B 'it':6A 'jazz':20 'jb':30 'low':9A,10A,28 'mamma':1A 'no':11A 'oldies':22 'prerock':29 'spots':17B 'swinging':12A 't':3A,8A,25,27 'unsorted':31 'whispering':18C
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['jazz', 'swing', '40s', 'vocal jazz', 'oldies']
                                        'tag_date'  1996
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620537251.0519931  (2021-05-09 07:14:11)
                             'size'  4524352