======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '182'
                                          'artist'  'Marion Harris'
                                     'text_people'  ''
                                         'release'  '20s and 30s popular'
                                           'title'  "There'll Be Some Changes Made"
                                           'quals'  ("['Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', 'q-chart-2', "
 "'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                                      'lastfmtags'  "['20s', 'jazz', 'female vocalists', '1920s', 'blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1925'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '84.245'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '20s and 30s popular'
'TBPM' (BPM (beats per minute))                     '84.245'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1925'
'TIT2' (Title/songname/content description)         "There'll Be Some Changes Made"
'TKEY' (Initial key)                                '1A'
'TLEN' (Length)                                     '182194'
'TPE1' (Lead performer(s)/Soloist(s))               'Marion Harris'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['20s', 'jazz', 'female vocalists', '1920s', 'blues']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'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'                        '+2.53 dB'
'TXXX:replaygain_track_peak'                        '0.393124'

========================== row from database ==========================
                                              'id'  1518913
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Marion Harris - There_ll Be Some Changes Made.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  182
                                           'genre'  prerock-unsorted
                                        'filesize'  2940928
                                           'mtime'  1620385482
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s There_ll prerock unsorted
                                      'tag_artist'  Marion Harris
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  There'll Be Some Changes Made
                                             'bpm'  84.245
                                    'search_title'  'be':4 'changes':6 'll':2 'made':7 'some':5 'there':1 'therell':3
                                   'search_artist'  'harris':2 'marion':1
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':7 'country':4 'exotica':2 'jazz':1 'll':9 'oldies':3 'prerock':10 'there':8 'unsorted':11
                                    'search_combo'  '00oldiepop':18 '1920s':19 '1930s':20 '20s':10C '30s':12C 'and':11C 'be':4A 'changes':6A 'country':17 'exotica':15 'harris':9B 'jazz':14 'll':2A,22 'made':7A 'marion':8B 'oldies':16 'popular':13C 'prerock':23 'some':5A 'there':1A,21 'therell':3A 'unsorted':24
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  1A
                                           '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-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-2', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['20s', 'jazz', 'female vocalists', '1920s', 'blues']
                                        'tag_date'  1925
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620385482.3636794  (2021-05-07 13:04:42)
                             'size'  2940928