======================== unified (from filesystem) ========================
                                         'bitrate'  '219.214'
                                        'duration'  '354'
                                          'artist'  'Biosphere'
                                     'text_people'  ''
                                         'release'  'Cirque'
                                           'title'  'When I leave'
                                           'quals'  "['q-bass-4', 'q-drums-3', 'q-other-1', 'q-piano-1', 'q-vocals-1']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'im-calmer'
                                             'bpm'  '84.2'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'MCDI' (Music CD identifier)                        MCDI(data=b'B\x00+\x009\x006\x00+\x004\x007\x00A\x009\x00+\x00A\x00A\x002\x00C\x00+\x00B\x008\x004\x00B\x00+\x001\x001\x002\x009\x00F\x00+\x001\x002\x005\x006\x003\x00+\x001\x008\x00D\x004\x007\x00+\x002\x000\x001\x00F\x008\x00+\x002\x002\x00C\x008\x00B\x00+\x002\x009\x001\x000\x00D\x00+\x002\x00E\x00E\x003\x006\x00+\x003\x004\x003\x00C\x001\x00\x00\x00')
'TALB' (Album/Movie/Show title)                     'Cirque'
'TBPM' (BPM (beats per minute))                     '84.2'
'TCON' (Content type, a.k.a. Genre)                 'im-calmer'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'When I leave'
'TKEY' (Initial key)                                '2A'
'TPE1' (Lead performer(s)/Soloist(s))               'Biosphere'
'TRCK' (Track number/Position in set)               '6'
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '1'

========================== row from database ==========================
                                              'id'  1537111
                                            'path'  /data/Music/Other/F3/Biosphere/2000 - Cirque du Soleil/06-When I leave.mp3
                                         'working'  None
                                         'bitrate'  219
                                    'duration_sec'  354
                                           'genre'  im-calmer
                                        'filesize'  9719808
                                           'mtime'  1662800200
                                   'redo_metaread'  0
                                        'rest_str'   F3 2000 du Soleil 06 im calmer
                                      'tag_artist'  Biosphere
                                     'tag_release'  Cirque
                                       'tag_title'  When I leave
                                             'bpm'  84.2
                                    'search_title'  'i':2 'leave':3 'when':1
                                   'search_artist'  'biosphere':1
                                  'search_release'  'cirque':1
                                     'search_rest'  '2000':2 'calmer':6 'du':3 'f3':1 'im':5 'soleil':4
                                    'search_combo'  '2000':7 'biosphere':4B 'calmer':11 'cirque':5C 'du':8 'f3':6 'i':2A 'im':10 'leave':3A 'soleil':9 'when':1A
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  2A
                                           'quals'  ['q-bass-4', 'q-drums-3', 'q-other-1', 'q-piano-1', 'q-vocals-1']
                                      'lastfmtags'  []
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800200.280149  (2022-09-10 10:56:40)
                             'size'  9719808