======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '170'
                                          'artist'  'Bellini'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Samba De Janeiro'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', 'Q-UNU-2', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['dance', 'math rock', 'indie', 'samba', 'noise rock']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '132.966'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            'd:\\mp3\\Bellini_-_Samba_De_Jane'
'COMM:MusicMatch_Path:XXX'                          'd:\\mp3\\Bellini_-_Samba_De_Janeiro.mp3'
'TBPM' (BPM (beats per minute))                     '132.966'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TIT2' (Title/songname/content description)         'Samba De Janeiro'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Bellini'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['dance', 'math rock', 'indie', 'samba', 'noise rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.13 dB'
'TXXX:replaygain_track_peak'                        '0.428500'

========================== row from database ==========================
                                              'id'  1491638
                                            'path'  /data/Music/Bulk/00localcharacter/00mid-north-europe/00dutch/Bellini - Samba De Janeiro.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  170
                                           'genre'  electronic-unsorted
                                        'filesize'  2739622
                                           'mtime'  1621695796
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00mid north europe 00dutch electronic unsorted
                                      'tag_artist'  Bellini
                                     'tag_release'  None
                                       'tag_title'  Samba De Janeiro
                                             'bpm'  132.966
                                    'search_title'  'de':2 'janeiro':3 'samba':1
                                   'search_artist'  'bellini':1
                                  'search_release'  
                                     'search_rest'  '00dutch':4 '00mid':1 'electronic':5 'europe':3 'north':2 'unsorted':6
                                    'search_combo'  '00dutch':8 '00mid':5 'bellini':4B 'de':2A 'electronic':9 'europe':7 'janeiro':3A 'north':6 'samba':1A 'unsorted':10
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['dance', 'math rock', 'indie', 'samba', 'noise rock']
                                        'tag_date'  
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1621695796.051048  (2021-05-22 17:03:16)
                             'size'  2739622