======================== unified (from filesystem) ========================
                                         'bitrate'  '170.687'
                                        'duration'  '254'
                                          'artist'  ''
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  ''
                                           'quals'  "['q-bass-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-4']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  ''
                                             'bpm'  '101.5'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '101.5'
'TKEY' (Initial key)                                '6A'
'TXXX:q-bass'                                       '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '4'

========================== row from database ==========================
                                              'id'  1538203
                                            'path'  /data/Music/Other/PrevSet/[0yay1]/Di Gojim/Ergens - De Vlinder - Vlinder.mp3
                                         'working'  None
                                         'bitrate'  171
                                    'duration_sec'  254
                                           'genre'  
                                        'filesize'  5433978
                                           'mtime'  1662800153
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [0yay1] Di Gojim Ergens De Vlinder Vlinder
                                      'tag_artist'  None
                                     'tag_release'  None
                                       'tag_title'  None
                                             'bpm'  101.5
                                    'search_title'  None
                                   'search_artist'  None
                                  'search_release'  
                                     'search_rest'  '0yay1':2,3 'de':7 'di':4 'ergens':6 'gojim':5 'prev':9 'prevset':1 'set':10 'vlinder':8
                                    'search_combo'  '0yay1':2,3 'de':7 'di':4 'ergens':6 'gojim':5 'prev':9 'prevset':1 'set':10 'vlinder':8
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['q-bass-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-4']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800152.7976823  (2022-09-10 10:55:52)
                             'size'  5433978