======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '329'
                                          'artist'  'Gregorian Chants'
                                     'text_people'  ''
                                         'release'  'Song of the Beatles'
                                           'title'  'Hey Jude'
                                           'quals'  "['q-bass-4', 'q-drums-2', 'q-other-1', 'q-piano-2', 'q-vocals-4']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'Other'
                                             'bpm'  '132.0'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         'Encoded by Dockey (LameEnc)'
'TALB' (Album/Movie/Show title)                     'Song of the Beatles'
'TBPM' (BPM (beats per minute))                     '132.0'
'TCON' (Content type, a.k.a. Genre)                 'Other'
'TIT2' (Title/songname/content description)         'Hey Jude'
'TKEY' (Initial key)                                '10B'
'TLEN' (Length)                                     '329926'
'TPE1' (Lead performer(s)/Soloist(s))               'Gregorian Chants'
'TRCK' (Track number/Position in set)               '2'
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '2'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '2'
'TXXX:q-vocals'                                     '4'

========================== row from database ==========================
                                              'id'  1538376
                                            'path'  /data/Music/Other/PrevSet/[9amusing]/Gregorian/Hey Jude.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  329
                                           'genre'  Other
                                        'filesize'  10560031
                                           'mtime'  1662800489
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [9amusing] Other
                                      'tag_artist'  Gregorian Chants
                                     'tag_release'  Song of the Beatles
                                       'tag_title'  Hey Jude
                                             'bpm'  132.0
                                    'search_title'  'hey':1 'jude':2
                                   'search_artist'  'chants':2 'gregorian':1
                                  'search_release'  'beatles':4 'of':2 'song':1 'the':3
                                     'search_rest'  '9amusing':2,3 'other':4 'prev':5 'prevset':1 'set':6
                                    'search_combo'  '9amusing':10,11 'beatles':8C 'chants':4B 'gregorian':3B 'hey':1A 'jude':2A 'of':6C 'other':12 'prev':13 'prevset':9 'set':14 'song':5C 'the':7C
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['q-bass-4', 'q-drums-2', 'q-other-1', 'q-piano-2', 'q-vocals-4']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800489.1588233  (2022-09-10 11:01:29)
                             'size'  10560031