======================== unified (from filesystem) ========================
                                         'bitrate'  '96.0'
                                        'duration'  '210'
                                          'artist'  'Unknown'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Hard-hearted Hannah'
                                           'quals'  "['q-bass-2', 'q-drums-2', 'q-other-1', 'q-piano-1', 'q-vocals-4']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'Jazz'
                                             'bpm'  '98.6'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'POPM:'                                             POPM(email='', rating=204)
'PRIV:www.mexp.dk:\x01\x0b\x00\x00\x00\x00good stuff'  PRIV(owner='www.mexp.dk', data=b'\x01\x0b\x00\x00\x00\x00good stuff')
'TBPM' (BPM (beats per minute))                     '98.6'
'TCON' (Content type, a.k.a. Genre)                 'Jazz'
'TIT2' (Title/songname/content description)         'Hard-hearted Hannah'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Unknown'
'TRCK' (Track number/Position in set)               '7'
'TXXX:q-bass'                                       '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '4'

========================== row from database ==========================
                                              'id'  1538665
                                            'path'  /data/Music/Other/PrevSet/[5jazz, blues]/Hard Hearted Hannah.mp3
                                         'working'  None
                                         'bitrate'  96
                                    'duration_sec'  210
                                           'genre'  Jazz
                                        'filesize'  2531502
                                           'mtime'  1662800411
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [5jazz, blues] Hearted Jazz
                                      'tag_artist'  Unknown
                                     'tag_release'  None
                                       'tag_title'  Hard-hearted Hannah
                                             'bpm'  98.6
                                    'search_title'  'hannah':4 'hard':1 'hardhearted':3 'hearted':2
                                   'search_artist'  'unknown':1
                                  'search_release'  
                                     'search_rest'  '5jazz':2,3 'blues':4,5 'hearted':6 'jazz':7 'prev':8 'prevset':1 'set':9
                                    'search_combo'  '5jazz':7,8 'blues':9,10 'hannah':4A 'hard':1A 'hardhearted':3A 'hearted':2A,11 'jazz':12 'prev':13 'prevset':6 'set':14 'unknown':5B
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['q-bass-2', 'q-drums-2', 'q-other-1', 'q-piano-1', 'q-vocals-4']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800411.2693374  (2022-09-10 11:00:11)
                             'size'  2531502