======================== unified (from filesystem) ========================
                                         'bitrate'  '227.916'
                                        'duration'  '253'
                                          'artist'  'Client'
                                     'text_people'  ''
                                         'release'  'Heartland'
                                           'title'  'Monkey on My Back'
                                           'quals'  "['q-bass-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-2']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  '11'
                                            'date'  '2007'
                                        'comments'  ''
                                           'genre'  ''
                                             'bpm'  '125.0'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         '.'
'TALB' (Album/Movie/Show title)                     'Heartland'
'TBPM' (BPM (beats per minute))                     '125.0'
'TDRC' (Recording time)                             '2007'
'TIT2' (Title/songname/content description)         'Monkey on My Back'
'TKEY' (Initial key)                                '2A'
'TPE1' (Lead performer(s)/Soloist(s))               'Client'
'TRCK' (Track number/Position in set)               '9/11'
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '2'

========================== row from database ==========================
                                              'id'  1538712
                                            'path'  /data/Music/Other/PrevSet/[9amusing]/Monkey/Client - monkey on my back.mp3
                                         'working'  None
                                         'bitrate'  228
                                    'duration_sec'  253
                                           'genre'  
                                        'filesize'  7227373
                                           'mtime'  1662800569
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [9amusing] monkey my back
                                      'tag_artist'  Client
                                     'tag_release'  Heartland
                                       'tag_title'  Monkey on My Back
                                             'bpm'  125.0
                                    'search_title'  'back':4 'monkey':1 'my':3 'on':2
                                   'search_artist'  'client':1
                                  'search_release'  'heartland':1
                                     'search_rest'  '9amusing':2,3 'back':6 'monkey':4 'my':5 'prev':7 'prevset':1 'set':8
                                    'search_combo'  '9amusing':8,9 'back':4A,12 'client':5B 'heartland':6C 'monkey':1A,10 'my':3A,11 'on':2A 'prev':13 'prevset':7 'set':14
                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  2A
                                           'quals'  ['q-bass-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-2']
                                      'lastfmtags'  []
                                        'tag_date'  2007
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800569.49623  (2022-09-10 11:02:49)
                             'size'  7227373