======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '167'
                                          'artist'  'Paul Robeson'
                                     'text_people'  ''
                                         'release'  '20s and 30s popular'
                                           'title'  'Londonderry Air (Danny Boy)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-1', 'q-vocals-4', 'q-mixbeat-1', "
 "'Q-PIANO-3']")
                                      'lastfmtags'  "['american', 'blues', 'spiritual', 'folk', 'gospel']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  '22'
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '132.098'
                                             'key'  '2B'
                                        'acoustid'  '9cc692a5-451d-4684-9b51-87c80f860453'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'PRIV:AverageLevel:\x81\x0c\x00\x00'                PRIV(owner='AverageLevel', data=b'\x81\x0c\x00\x00')
'PRIV:PeakValue:a\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'a\x7f\x00\x00')
'TALB' (Album/Movie/Show title)                     '20s and 30s popular'
'TBPM' (BPM (beats per minute))                     '132.098'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         'Londonderry Air (Danny Boy)'
'TKEY' (Initial key)                                '2B'
'TLEN' (Length)                                     '167347'
'TPE1' (Lead performer(s)/Soloist(s))               'Paul Robeson'
'TPE2' (Band/orchestra/accompaniment)               'Paul Robeson'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '7/22'
'TSO2'                                              'Robeson, Paul'
'TSOP' (Performer sort order)                       'Robeson, Paul'
'TXXX:ASIN'                                         'B000000ECS'
'TXXX:Acoustid Id'                                  '9cc692a5-451d-4684-9b51-87c80f860453'
'TXXX:MusicBrainz Album Artist Id'                  'bbc5febe-0321-4bb2-adcd-8dafbf8d8841'
'TXXX:MusicBrainz Album Id'                         '0c791fb9-577c-43e7-ac71-d9fba5c341b4'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'compilation'
'TXXX:MusicBrainz Artist Id'                        'bbc5febe-0321-4bb2-adcd-8dafbf8d8841'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['american', 'blues', 'spiritual', 'folk', 'gospel']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.43 dB'
'TXXX:replaygain_track_peak'                        '0.703703'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'bd71fb66-4998-4dd4-8bda-4af80646950b')

========================== row from database ==========================
                                              'id'  1151214
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Paul Robeson - Danny Boy.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  167
                                           'genre'  prerock-vocal
                                        'filesize'  3362816
                                           'mtime'  1620666361
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s prerock vocal
                                      'tag_artist'  Paul Robeson
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  Londonderry Air (Danny Boy)
                                             'bpm'  132.098
                                    'search_title'  'air':2 'boy':5,6 'danny':3,4 'londonderry':1
                                   'search_artist'  'paul':1 'robeson':2
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8 'vocal':9
                                    'search_combo'  '00oldiepop':17 '1920s':18 '1930s':19 '20s':9C '30s':11C 'air':2A 'and':10C 'boy':5A,6A 'country':16 'danny':3A,4A 'exotica':14 'jazz':13 'londonderry':1A 'oldies':15 'paul':7B 'popular':12C 'prerock':20 'robeson':8B 'vocal':21
                                    'tag_tracknum'  7
                                      'num_images'  1
                                             'key'  2B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'Q-PIANO-3', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['american', 'blues', 'spiritual', 'folk', 'gospel']
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620666361.012871  (2021-05-10 19:06:01)
                             'size'  3362816