======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '217'
                                          'artist'  'Sandra'
                                     'text_people'  ''
                                         'release'  '18 Greatest Hits'
                                           'title'  'Everlasting Love'
                                           'quals'  "['q-bass-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  '18'
                                            'date'  '1992'
                                        'comments'  ''
                                           'genre'  'eighties,pop'
                                             'bpm'  '120.0'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '18 Greatest Hits'
'TBPM' (BPM (beats per minute))                     '120.0'
'TCON' (Content type, a.k.a. Genre)                 'eighties,pop'
'TDRC' (Recording time)                             '1992'
'TIT2' (Title/songname/content description)         'Everlasting Love'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Sandra'
'TRCK' (Track number/Position in set)               '8/18'
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.06 dB'
'TXXX:replaygain_track_peak'                        '0.502834'

========================== row from database ==========================
                                              'id'  1538521
                                            'path'  /data/Music/Other/PrevSet/[7zomgeighties]/Sandra - Everlasting Love.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  217
                                           'genre'  eighties,pop
                                        'filesize'  3483418
                                           'mtime'  1662800456
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [7zomgeighties] eighties,pop
                                      'tag_artist'  Sandra
                                     'tag_release'  18 Greatest Hits
                                       'tag_title'  Everlasting Love
                                             'bpm'  120.0
                                    'search_title'  'everlasting':1 'love':2
                                   'search_artist'  'sandra':1
                                  'search_release'  '18':1 'greatest':2 'hits':3
                                     'search_rest'  '7zomgeighties':2,3 'eighties':4,6 'pop':5,7 'prev':8 'prevset':1 'set':9
                                    'search_combo'  '18':4C '7zomgeighties':8,9 'eighties':10,12 'everlasting':1A 'greatest':5C 'hits':6C 'love':2A 'pop':11,13 'prev':14 'prevset':7 'sandra':3B 'set':15
                                    'tag_tracknum'  8
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['q-bass-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3']
                                      'lastfmtags'  []
                                        'tag_date'  1992
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800456.2118866  (2022-09-10 11:00:56)
                             'size'  3483418