======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '296'
                                          'artist'  'The Knife'
                                     'text_people'  ''
                                         'release'  'Deep Cuts'
                                           'title'  'Rock classics'
                                           'quals'  "['q-bass-4', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-2']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '09'
                                      'tracktotal'  ''
                                            'date'  '2003'
                                        'comments'  ''
                                           'genre'  'Pop'
                                             'bpm'  '139.9'
                                             'key'  'G m'  (6A)
                                        'acoustid'  ''
rest: ''

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

'COMM::XXX'                                         'WHOA!'
'POPM:\x01ÿþ3'                                      POPM(email='\x01ÿþ3', rating=0, count=0)
'PRIV:www.mexp.dk:\x01\x06\x00\x00\x00\x003star'    PRIV(owner='www.mexp.dk', data=b'\x01\x06\x00\x00\x00\x003star')
'TALB' (Album/Movie/Show title)                     'Deep Cuts'
'TBPM' (BPM (beats per minute))                     '139.9'
'TCON' (Content type, a.k.a. Genre)                 'Pop'
'TDRC' (Recording time)                             '2003'
'TIT2' (Title/songname/content description)         'Rock classics'
'TKEY' (Initial key)                                'G m'
'TPE1' (Lead performer(s)/Soloist(s))               'The Knife'
'TPE2' (Band/orchestra/accompaniment)               'The Knife'
'TRCK' (Track number/Position in set)               '09'
'TXXX:http://www.foosic.org/'                       '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'
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '2'

========================== row from database ==========================
                                              'id'  1538247
                                            'path'  /data/Music/Other/PrevSet/[2electro1-softer]/The Knife/Rock Classics.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  296
                                           'genre'  Pop
                                        'filesize'  7115405
                                           'mtime'  1657690423
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [2electro1 softer] Classics Pop
                                      'tag_artist'  The Knife
                                     'tag_release'  Deep Cuts
                                       'tag_title'  Rock classics
                                             'bpm'  139.9
                                    'search_title'  'classics':2 'rock':1
                                   'search_artist'  'knife':2 'the':1
                                  'search_release'  'cuts':2 'deep':1
                                     'search_rest'  '2electro1':2,3 'classics':6 'pop':7 'prev':8 'prevset':1 'set':9 'softer':4,5
                                    'search_combo'  '2electro1':8,9 'classics':2A,12 'cuts':6C 'deep':5C 'knife':4B 'pop':13 'prev':14 'prevset':7 'rock':1A 'set':15 'softer':10,11 'the':3B
                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  G m
                                           'quals'  ['q-bass-4', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-2']
                                      'lastfmtags'  []
                                        'tag_date'  2003
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1657690423.1510901  (2022-07-13 07:33:43)
                             'size'  7115405