======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '227'
                                          'artist'  '2raumwohnung'
                                     'text_people'  ''
                                         'release'  'Perfekte Welle'
                                           'title'  'Spiel mit'
                                           'quals'  "['q-bass-4', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-2']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '12'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'Pop'
                                             'bpm'  '124.9'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Perfekte Welle'
'TBPM' (BPM (beats per minute))                     '124.9'
'TCON' (Content type, a.k.a. Genre)                 'Pop'
'TIT2' (Title/songname/content description)         'Spiel mit'
'TKEY' (Initial key)                                '2A'
'TPE1' (Lead performer(s)/Soloist(s))               '2raumwohnung'
'TPE2' (Band/orchestra/accompaniment)               '2raumwohnung'
'TRCK' (Track number/Position in set)               '12'
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '2'

========================== row from database ==========================
                                              'id'  1538624
                                            'path'  /data/Music/Other/PrevSet/[9zdesorted]/2raumwohnung/Spiel mit.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  227
                                           'genre'  Pop
                                        'filesize'  5480315
                                           'mtime'  1662800544
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [9zdesorted] Pop
                                      'tag_artist'  2raumwohnung
                                     'tag_release'  Perfekte Welle
                                       'tag_title'  Spiel mit
                                             'bpm'  124.9
                                    'search_title'  'mit':2 'spiel':1
                                   'search_artist'  '2raumwohnung':1
                                  'search_release'  'perfekte':1 'welle':2
                                     'search_rest'  '9zdesorted':2,3 'pop':4 'prev':5 'prevset':1 'set':6
                                    'search_combo'  '2raumwohnung':3B '9zdesorted':7,8 'mit':2A 'perfekte':4C 'pop':9 'prev':10 'prevset':6 'set':11 'spiel':1A 'welle':5C
                                    'tag_tracknum'  12
                                      'num_images'  0
                                             'key'  2A
                                           'quals'  ['q-bass-4', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-2']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800543.6090655  (2022-09-10 11:02:23)
                             'size'  5480315