======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '161'
                                          'artist'  'Zez Confrey'
                                     'text_people'  ''
                                         'release'  'QRS 101003'
                                           'title'  'Kitten On The Keys (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'  '114.156'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'QRS 101003'
'TBPM' (BPM (beats per minute))                     '114.156'
'TCON' (Content type, a.k.a. Genre)                 'prerock-ragtime'
'TDRC' (Recording time)                             '1921'
'TIT2' (Title/songname/content description)         'Kitten On The Keys (piano roll)'
'TKEY' (Initial key)                                '7B'
'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'                        '-0.27 dB'
'TXXX:replaygain_track_peak'                        '0.666458'

========================== row from database ==========================
                                              'id'  1443079
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1921/Zez Confrey - Kitten On The Keys (piano roll) -2-1921.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  161
                                           'genre'  prerock-ragtime
                                        'filesize'  3223346
                                           'mtime'  1620573912
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1921 2 1921 prerock ragtime
                                      'tag_artist'  Zez Confrey
                                     'tag_release'  QRS 101003
                                       'tag_title'  Kitten On The Keys (piano roll)
                                             'bpm'  114.156
                                    'search_title'  'keys':4 'kitten':1 'on':2 'piano':5,6 'roll':7,8 'the':3
                                   'search_artist'  'confrey':2 'zez':1
                                  'search_release'  '101003':2 'qrs':1
                                     'search_rest'  '00oldiepop':5 '1921':6 '2':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8 'ragtime':9
                                    'search_combo'  '00oldiepop':17 '101003':12C '1921':18 '2':19 'confrey':10B 'country':16 'exotica':14 'jazz':13 'keys':4A 'kitten':1A 'oldies':15 'on':2A 'piano':5A,6A 'prerock':20 'qrs':11C 'ragtime':21 'roll':7A,8A 'the':3A 'zez':9B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7B
                                           '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'  1620573911.9163833  (2021-05-09 17:25:11)
                             'size'  3223346