======================== unified (from filesystem) ========================
                                         'bitrate'  '219.538'
                                        'duration'  '333'
                                          'artist'  'F.R. David'
                                     'text_people'  ''
                                         'release'  'Kneipenhits (Italo Party)'
                                           'title'  'Words'
                                           'quals'  "['q-bass-3', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '18'
                                      'tracktotal'  ''
                                            'date'  '2006'
                                        'comments'  ''
                                           'genre'  'pop,eighties,zomgeighties'
                                             'bpm'  '120.0'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Kneipenhits (Italo Party)'
'TBPM' (BPM (beats per minute))                     '120.0'
'TCON' (Content type, a.k.a. Genre)                 'pop,eighties,zomgeighties'
'TDRC' (Recording time)                             '2006'
'TIT2' (Title/songname/content description)         'Words'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'F.R. David'
'TRCK' (Track number/Position in set)               '18'
'TXXX:q-bass'                                       '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.71 dB'
'TXXX:replaygain_track_peak'                        '0.749477'

========================== row from database ==========================
                                              'id'  1538692
                                            'path'  /data/Music/Other/PrevSet/[7zomgeighties]/f.r._david_-_words.mp3
                                         'working'  None
                                         'bitrate'  220
                                    'duration_sec'  333
                                           'genre'  pop,eighties,zomgeighties
                                        'filesize'  9160552
                                           'mtime'  1662800513
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [7zomgeighties] f.r._david_ _words pop,eighties,zomgeighties
                                      'tag_artist'  F.R. David
                                     'tag_release'  Kneipenhits (Italo Party)
                                       'tag_title'  Words
                                             'bpm'  120.0
                                    'search_title'  'words':1
                                   'search_artist'  'david':4 'f':1 'fr':3 'r':2
                                  'search_release'  'italo':2,3 'kneipenhits':1 'party':4,5
                                     'search_rest'  '7zomgeighties':2,3 'david':6,8 'eighties':11,14 'f':4 'fr':7 'pop':10,13 'prev':16 'prevset':1 'r':5 'set':17 'words':9 'zomgeighties':12,15
                                    'search_combo'  '7zomgeighties':12,13 'david':5B,16,18 'eighties':21,24 'f':2B,14 'fr':4B,17 'italo':7C,8C 'kneipenhits':6C 'party':9C,10C 'pop':20,23 'prev':26 'prevset':11 'r':3B,15 'set':27 'words':1A,19 'zomgeighties':22,25
                                    'tag_tracknum'  18
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['q-bass-3', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3']
                                      'lastfmtags'  []
                                        'tag_date'  2006
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800512.654065  (2022-09-10 11:01:52)
                             'size'  9160552