======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '197'
                                          'artist'  'Mississippi John Hurt'
                                     'text_people'  'Traditional'
                                         'release'  'Anthology Of American Fold Music'
                                           'title'  'Spike Driver Blues'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['acoustic', 'blues', 'delta blues', 'folk', 'classic blues']"
                                     'discogstags'  "['blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '80'
                                      'tracktotal'  '84'
                                            'date'  '1952'
                                        'comments'  ''
                                           'genre'  'loc-namerica;prerock-americana'
                                             'bpm'  '96.946'
                                             'key'  '4B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            '000002ac 00000002 00004a30 0'
'COMM:iTunNORM:eng'                                 ('000002ac 00000002 00004a30 00000e50 0001556d 0002ecc6 00008046 00008046 '
 '00008c1a 00008c1a')
'COMM:iTunSMPB:eng'                                 ('00000000 00000210 0000099c 0000000000849054 00000000 00000000 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '14+272215f3ff8d537152d80a5137f307ec+799439'
'TALB' (Album/Movie/Show title)                     'Anthology Of American Fold Music'
'TBPM' (BPM (beats per minute))                     '96.946'
'TCOM' (Composer)                                   'Traditional'
'TCON' (Content type, a.k.a. Genre)                 ['loc-namerica', 'prerock-americana']
'TDRC' (Recording time)                             '1952'
'TENC' (Encoded by)                                 'Itunes V6.0.1.3'
'TIT2' (Title/songname/content description)         'Spike Driver Blues'
'TKEY' (Initial key)                                '4B'
'TPE1' (Lead performer(s)/Soloist(s))               'Mississippi John Hurt'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '6/6'
'TRCK' (Track number/Position in set)               '80/84'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'blues'
'TXXX:lastfmtags'                                   ['acoustic', 'blues', 'delta blues', 'folk', 'classic blues']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+3.06 dB'
'TXXX:replaygain_track_peak'                        '0.843180'

========================== row from database ==========================
                                              'id'  984749
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Various Artists - 1952 - Anthology Of American Fold Music/80 - Spike Driver Blues - Mississippi John Hurt.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  197
                                           'genre'  loc-namerica;prerock-americana
                                        'filesize'  3959221
                                           'mtime'  1621628449
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Various Artists 1952 80 loc namerica;prerock americana
                                      'tag_artist'  Mississippi John Hurt
                                     'tag_release'  Anthology Of American Fold Music
                                       'tag_title'  Spike Driver Blues
                                             'bpm'  96.946
                                    'search_title'  'blues':3 'driver':2 'spike':1
                                   'search_artist'  'hurt':3 'john':2 'mississippi':1
                                  'search_release'  'american':3 'anthology':1 'fold':4 'music':5 'of':2
                                     'search_rest'  '1952':7 '80':8 'americana':14 'artists':6 'country':4 'exotica':2 'jazz':1 'loc':9 'namerica':10,12 'oldies':3 'prerock':11,13 'various':5
                                    'search_combo'  '1952':18 '80':19 'american':9C 'americana':25 'anthology':7C 'artists':17 'blues':3A 'country':15 'driver':2A 'exotica':13 'fold':10C 'hurt':6B 'jazz':12 'john':5B 'loc':20 'mississippi':4B 'music':11C 'namerica':21,23 'of':8C 'oldies':14 'prerock':22,24 'spike':1A 'various':16
                                    'tag_tracknum'  80
                                      'num_images'  1
                                             'key'  4B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['acoustic', 'blues', 'delta blues', 'folk', 'classic blues']
                                        'tag_date'  1952
                                     'discogstags'  ['blues']

============================== file details ==============================
                                           'mtime'  1621628449.3457823  (2021-05-21 22:20:49)
                             'size'  3959221