======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '208'
                                          'artist'  'Nelson Eddy'
                                     'text_people'  ''
                                         'release'  '20s and 30s popular'
                                           'title'  "ISN'T IT ROMANTIC?"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['male vocalists', 'easy listening', 'xmas', 'oldies', 'spotify']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '141.216'
                                             'key'  '6A'
                                        '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))                     '141.216'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         "ISN'T IT ROMANTIC?"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Nelson Eddy'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['male vocalists', 'easy listening', 'xmas', 'oldies', 'spotify']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.43 dB'
'TXXX:replaygain_track_peak'                        '0.502007'

========================== row from database ==========================
                                              'id'  1512762
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Nelson Eddy, Jeanette MacDonald - Isn_t it Romantic.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  208
                                           'genre'  prerock-vocal
                                        'filesize'  3367421
                                           'mtime'  1620666356
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s Eddy, Jeanette MacDonald Isn_t it Romantic prerock vocal
                                      'tag_artist'  Nelson Eddy
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  ISN'T IT ROMANTIC?
                                             'bpm'  141.216
                                    'search_title'  'isn':1 'isnt':3 'it':4 'romantic':5 't':2
                                   'search_artist'  'eddy':2 'nelson':1
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':7 'country':4 'donald':19 'eddy':8,9 'exotica':2 'isn':12 'it':14 'jazz':1 'jeanette':10 'mac':18 'macdonald':11 'oldies':3 'prerock':16 'romantic':15 't':13 'vocal':17
                                    'search_combo'  '00oldiepop':16 '1920s':17 '1930s':18 '20s':8C '30s':10C 'and':9C 'country':15 'donald':30 'eddy':7B,19,20 'exotica':13 'isn':1A,23 'isnt':3A 'it':4A,25 'jazz':12 'jeanette':21 'mac':29 'macdonald':22 'nelson':6B 'oldies':14 'popular':11C 'prerock':27 'romantic':5A,26 't':2A,24 'vocal':28
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6A
                                           '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-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['male vocalists', 'easy listening', 'xmas', 'oldies', 'spotify']
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620666356.3043315  (2021-05-10 19:05:56)
                             'size'  3367421