======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '285'
                                          'artist'  'Winifred Atwell'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Let's Have A Ding Dong (part 1 & 2)"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['boogie woogie', 'ragtime', 'jazz', 'piano', 'oldies']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1955'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '100.655'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '100.655'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1955'
'TIT2' (Title/songname/content description)         "Let's Have A Ding Dong (part 1 & 2)"
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Winifred Atwell'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['boogie woogie', 'ragtime', 'jazz', 'piano', 'oldies']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.80 dB'
'TXXX:replaygain_track_peak'                        '0.486452'

========================== row from database ==========================
                                              'id'  1511033
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1955/Winifred Atwell - Let_s Have A Ding Dong (part 1 & 2) 4-11-1955.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  285
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  5713706
                                           'mtime'  1620527729
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1955 Let_s 4 11 1955 prerock jb jazz unsorted
                                      'tag_artist'  Winifred Atwell
                                     'tag_release'  None
                                       'tag_title'  Let's Have A Ding Dong (part 1 & 2)
                                             'bpm'  100.655
                                    'search_title'  '1':10 '2':11,12 'a':5 'ding':6 'dong':7 'have':4 'let':1 'lets':3 'part':8,9 's':2
                                   'search_artist'  'atwell':2 'winifred':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1955':6 '4':9 'country':4 'exotica':2 'jazz':1 'jb':11 'let':7 'oldies':3 'prerock':10 's':8 'unsorted':12
                                    'search_combo'  '00oldiepop':19 '1':10A '1955':20 '2':11A,12A '4':23 'a':5A 'atwell':14B 'country':18 'ding':6A 'dong':7A 'exotica':16 'have':4A 'jazz':15 'jb':25 'let':1A,21 'lets':3A 'oldies':17 'part':8A,9A 'prerock':24 's':2A,22 'unsorted':26 'winifred':13B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['boogie woogie', 'ragtime', 'jazz', 'piano', 'oldies']
                                        'tag_date'  1955
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620527728.8851633  (2021-05-09 04:35:28)
                             'size'  5713706