<pre>
======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '109'
                                          'artist'  'Richard Cheese'
                                     'text_people'  ''
                                         'release'  'Tuxicity'
                                           'title'  'Crazy (Britney Spears)'
                                           'quals'  "['q-bass-4', 'q-drums-3', 'q-other-1', 'q-piano-3', 'q-vocals-3']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '18'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'Rock/Pop'
                                             'bpm'  '121.3'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================<mutagen.mp3.MPEGInfo object at 0x7f9537d81460>

'APIC:'                                             type PictureType.OTHER (Other) b''<br/>                                     <img style="width:150px" src="image?fid=1538377"/>
'TALB' (Album/Movie/Show title)                     'Tuxicity'
'TBPM' (BPM (beats per minute))                     '121.3'
'TCON' (Content type, a.k.a. Genre)                 'Rock/Pop'
'TIT2' (Title/songname/content description)         'Crazy (Britney Spears)'
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '109061'
'TPE1' (Lead performer(s)/Soloist(s))               'Richard Cheese'
'TRCK' (Track number/Position in set)               '18'
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '3'
'TXXX:q-vocals'                                     '3'

========================== row from database ==========================
                                              'id'  1538377
                                            'path'  /data/Music/Other/PrevSet/[9amusing]/Richard Cheese/Crazy.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  109
                                           'genre'  Rock/Pop
                                        'filesize'  1747362
                                           'mtime'  1662800499
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [9amusing] Rock/Pop
                                      'tag_artist'  Richard Cheese
                                     'tag_release'  Tuxicity
                                       'tag_title'  Crazy (Britney Spears)
                                             'bpm'  121.3
                                    'search_title'  'britney':2,3 'crazy':1 'spears':4,5
                                   'search_artist'  'cheese':2 'richard':1
                                  'search_release'  'tuxicity':1
                                     'search_rest'  '9amusing':2,3 'pop':5 'prev':7 'prevset':1 'rock':4 'rockpop':6 'set':8
                                    'search_combo'  '9amusing':10,11 'britney':2A,3A 'cheese':7B 'crazy':1A 'pop':13 'prev':15 'prevset':9 'richard':6B 'rock':12 'rockpop':14 'set':16 'spears':4A,5A 'tuxicity':8C
                                    'tag_tracknum'  18
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['q-bass-4', 'q-drums-3', 'q-other-1', 'q-piano-3', 'q-vocals-3']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800499.47849  (2022-09-10 11:01:39)
                             'size'  1747362