======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '154'
                                          'artist'  'Zez Confrey'
                                     'text_people'  ''
                                         'release'  'QRS 100827'
                                           'title'  'My Pet (piano roll)'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'Q-PLAY-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', "
 "'Q-PIANO-4', 'q-chart-1', 'q-drums-1', 'q-other-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['1301fh', 'ragtime', 'jazz', 'piano', 'classical']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1921'
                                        'comments'  ''
                                           'genre'  'prerock-ragtime'
                                             'bpm'  '113.836'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'QRS 100827'
'TBPM' (BPM (beats per minute))                     '113.836'
'TCON' (Content type, a.k.a. Genre)                 'prerock-ragtime'
'TDRC' (Recording time)                             '1921'
'TIT2' (Title/songname/content description)         'My Pet (piano roll)'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Zez Confrey'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['1301fh', 'ragtime', 'jazz', 'piano', 'classical']
'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'                                      '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.17 dB'
'TXXX:replaygain_track_peak'                        '0.565280'

========================== row from database ==========================
                                              'id'  1443777
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1921/Zez Confrey - My Pet (piano roll) 1921.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  154
                                           'genre'  prerock-ragtime
                                        'filesize'  3090253
                                           'mtime'  1620573912
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1921 1921 prerock ragtime
                                      'tag_artist'  Zez Confrey
                                     'tag_release'  QRS 100827
                                       'tag_title'  My Pet (piano roll)
                                             'bpm'  113.836
                                    'search_title'  'my':1 'pet':2 'piano':3,4 'roll':5,6
                                   'search_artist'  'confrey':2 'zez':1
                                  'search_release'  '100827':2 'qrs':1
                                     'search_rest'  '00oldiepop':5 '1921':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':7 'ragtime':8
                                    'search_combo'  '00oldiepop':15 '100827':10C '1921':16 'confrey':8B 'country':14 'exotica':12 'jazz':11 'my':1A 'oldies':13 'pet':2A 'piano':3A,4A 'prerock':17 'qrs':9C 'ragtime':18 'roll':5A,6A 'zez':7B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-1', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['1301fh', 'ragtime', 'jazz', 'piano', 'classical']
                                        'tag_date'  1921
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620573911.9180653  (2021-05-09 17:25:11)
                             'size'  3090253