======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '169'
                                          'artist'  'Collins & Harlan'
                                     'text_people'  ''
                                         'release'  'Victor 17246'
                                           'title'  'Casey Jones Went Down On The Robert E Lee'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-1', '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-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1912'
                                        'comments'  ''
                                           'genre'  'prerock-ragtime'
                                             'bpm'  '139.9'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'COMM:MusicMatch_Tempo:eng'                         'None'
'TALB' (Album/Movie/Show title)                     'Victor 17246'
'TBPM' (BPM (beats per minute))                     '139.9'
'TCON' (Content type, a.k.a. Genre)                 'prerock-ragtime'
'TDRC' (Recording time)                             '1912-12-12'
'TIT2' (Title/songname/content description)         'Casey Jones Went Down On The Robert E Lee'
'TKEY' (Initial key)                                '7B'
'TLEN' (Length)                                     '169000'
'TPE1' (Lead performer(s)/Soloist(s))               'Collins & Harlan'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'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'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.55 dB'
'TXXX:replaygain_track_peak'                        '0.689787'

========================== row from database ==========================
                                              'id'  1474012
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1912/Collins & Harlan - Casey Jones Went Down On The Robert E Lee 12-12-1912.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  169
                                           'genre'  prerock-ragtime
                                        'filesize'  3455187
                                           'mtime'  1620526587
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1912 12 12 1912 prerock ragtime
                                      'tag_artist'  Collins & Harlan
                                     'tag_release'  Victor 17246
                                       'tag_title'  Casey Jones Went Down On The Robert E Lee
                                             'bpm'  139.9
                                    'search_title'  'casey':1 'down':4 'e':8 'jones':2 'lee':9 'on':5 'robert':7 'the':6 'went':3
                                   'search_artist'  'collins':1 'harlan':2
                                  'search_release'  '17246':2 'victor':1
                                     'search_rest'  '00oldiepop':5 '1912':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':7 'ragtime':8
                                    'search_combo'  '00oldiepop':18 '17246':13C '1912':19 'casey':1A 'collins':10B 'country':17 'down':4A 'e':8A 'exotica':15 'harlan':11B 'jazz':14 'jones':2A 'lee':9A 'oldies':16 'on':5A 'prerock':20 'ragtime':21 'robert':7A 'the':6A 'victor':12C 'went':3A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['q-vocals-4', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'q-bass-1', 'q-grit-2']
                                        'tag_date'  1912
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620526586.878012  (2021-05-09 04:16:26)
                             'size'  3455187