======================== unified (from filesystem) ========================
                                         'bitrate'  '96.0'
                                        'duration'  '200'
                                          'artist'  'Weird Al Yankovic'
                                     'text_people'  ''
                                         'release'  'Bad Hair Day'
                                           'title'  'Amish Paradise'
                                           'quals'  "['q-bass-4', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-3']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'Comedy'
                                             'bpm'  '109.2'
                                             'key'  'F m'  (4A)
                                        'acoustid'  ''
rest: ''

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

'POPM:'                                             POPM(email='', rating=153)
'POPM:\x01ÿþ0'                                      POPM(email='\x01ÿþ0', rating=0, count=0)
'TALB' (Album/Movie/Show title)                     'Bad Hair Day'
'TBPM' (BPM (beats per minute))                     '109.2'
'TCON' (Content type, a.k.a. Genre)                 'Comedy'
'TIT2' (Title/songname/content description)         'Amish Paradise'
'TKEY' (Initial key)                                'F m'
'TPE1' (Lead performer(s)/Soloist(s))               'Weird Al Yankovic'
'TRCK' (Track number/Position in set)               '1'
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'

========================== row from database ==========================
                                              'id'  1538802
                                            'path'  /data/Music/Other/PrevSet/[9amusing]/Weird Al Yankovic/Amish Paradise.mp3
                                         'working'  None
                                         'bitrate'  96
                                    'duration_sec'  200
                                           'genre'  Comedy
                                        'filesize'  2402307
                                           'mtime'  1657678055
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [9amusing] Comedy
                                      'tag_artist'  Weird Al Yankovic
                                     'tag_release'  Bad Hair Day
                                       'tag_title'  Amish Paradise
                                             'bpm'  109.2
                                    'search_title'  'amish':1 'paradise':2
                                   'search_artist'  'al':2 'weird':1 'yankovic':3
                                  'search_release'  'bad':1 'day':3 'hair':2
                                     'search_rest'  '9amusing':2,3 'comedy':4 'prev':5 'prevset':1 'set':6
                                    'search_combo'  '9amusing':10,11 'al':4B 'amish':1A 'bad':6C 'comedy':12 'day':8C 'hair':7C 'paradise':2A 'prev':13 'prevset':9 'set':14 'weird':3B 'yankovic':5B
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  F m
                                           'quals'  ['q-bass-4', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-3']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1657678055.383408  (2022-07-13 04:07:35)
                             'size'  2402307