======================== unified (from filesystem) ========================
                                         'bitrate'  '224.0'
                                        'duration'  '207'
                                          'artist'  'Joe Yellow'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Love at first'
                                           'quals'  "['q-bass-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '14'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'pop,eighties,zomgeighties'
                                             'bpm'  '106.9'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '106.9'
'TCON' (Content type, a.k.a. Genre)                 'pop,eighties,zomgeighties'
'TCOP' (Copyright message)                          "Lis'S"
'TIT2' (Title/songname/content description)         'Love at first'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Joe Yellow'
'TRCK' (Track number/Position in set)               '14'
'TXXX:q-bass'                                       '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.41 dB'
'TXXX:replaygain_track_peak'                        '0.386235'

========================== row from database ==========================
                                              'id'  1538118
                                            'path'  /data/Music/Other/PrevSet/[7zomgeighties]/Joe Yellow - Love at first.mp3
                                         'working'  None
                                         'bitrate'  224
                                    'duration_sec'  207
                                           'genre'  pop,eighties,zomgeighties
                                        'filesize'  5830385
                                           'mtime'  1662800482
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [7zomgeighties] pop,eighties,zomgeighties
                                      'tag_artist'  Joe Yellow
                                     'tag_release'  None
                                       'tag_title'  Love at first
                                             'bpm'  106.9
                                    'search_title'  'at':2 'first':3 'love':1
                                   'search_artist'  'joe':1 'yellow':2
                                  'search_release'  
                                     'search_rest'  '7zomgeighties':2,3 'eighties':5,8 'pop':4,7 'prev':10 'prevset':1 'set':11 'zomgeighties':6,9
                                    'search_combo'  '7zomgeighties':7,8 'at':2A 'eighties':10,13 'first':3A 'joe':4B 'love':1A 'pop':9,12 'prev':15 'prevset':6 'set':16 'yellow':5B 'zomgeighties':11,14
                                    'tag_tracknum'  14
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['q-bass-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800481.5990672  (2022-09-10 11:01:21)
                             'size'  5830385