<pre>
======================== unified (from filesystem) ========================
                                         'bitrate'  '183.933'
                                        'duration'  '239'
                                          'artist'  'Emilie Autumn'
                                     'text_people'  ''
                                         'release'  'Opheliac, Ltd. Deluxe Edition'
                                           'title'  "Thank God I'm pretty"
                                           'quals'  "['q-bass-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  '20'
                                            'date'  '2006'
                                        'comments'  ''
                                           'genre'  'Industrial'
                                             'bpm'  '145.3'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================<mutagen.mp3.MPEGInfo object at 0x7f95382f1ee0>

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'TALB' (Album/Movie/Show title)                     'Opheliac, Ltd. Deluxe Edition'
'TBPM' (BPM (beats per minute))                     '145.3'
'TCON' (Content type, a.k.a. Genre)                 'Industrial'
'TDRC' (Recording time)                             '2006'
'TENC' (Encoded by)                                 'Lame 3.90.3'
'TIT2' (Title/songname/content description)         "Thank God I'm pretty"
'TKEY' (Initial key)                                '12B'
'TLAN' (Language(s))                                'English'
'TPE1' (Lead performer(s)/Soloist(s))               'Emilie Autumn'
'TPE2' (Band/orchestra/accompaniment)               'Emilie Autumn'
'TPUB' (Publisher)                                  'Trisol (Soulfood Music)'
'TRCK' (Track number/Position in set)               '15/20'
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'TXXX:q-bass'                                       '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '4'
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========================== row from database ==========================
                                              'id'  1538344
                                            'path'  /data/Music/Other/PrevSet/[0yay1]/Emilie Autumn/Thank God I'm pretty.mp3
                                         'working'  None
                                         'bitrate'  184
                                    'duration_sec'  239
                                           'genre'  Industrial
                                        'filesize'  5582334
                                           'mtime'  1662800121
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [0yay1] Industrial
                                      'tag_artist'  Emilie Autumn
                                     'tag_release'  Opheliac, Ltd. Deluxe Edition
                                       'tag_title'  Thank God I'm pretty
                                             'bpm'  145.3
                                    'search_title'  'god':2 'i':3 'im':5 'm':4 'pretty':6 'thank':1
                                   'search_artist'  'autumn':2 'emilie':1
                                  'search_release'  'deluxe':5 'edition':6 'ltd':3,4 'opheliac':1,2
                                     'search_rest'  '0yay1':2,3 'industrial':4 'prev':5 'prevset':1 'set':6
                                    'search_combo'  '0yay1':16,17 'autumn':8B 'deluxe':13C 'edition':14C 'emilie':7B 'god':2A 'i':3A 'im':5A 'industrial':18 'ltd':11C,12C 'm':4A 'opheliac':9C,10C 'pretty':6A 'prev':19 'prevset':15 'set':20 'thank':1A
                                    'tag_tracknum'  15
                                      'num_images'  1
                                             'key'  12B
                                           'quals'  ['q-bass-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4']
                                      'lastfmtags'  []
                                        'tag_date'  2006
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800121.2067027  (2022-09-10 10:55:21)
                             'size'  5582334