======================== unified (from filesystem) ========================
                                         'bitrate'  '219.738'
                                        'duration'  '320'
                                          'artist'  'The Knife'
                                     'text_people'  ''
                                         'release'  'Silent Shout'
                                           'title'  'Marble House'
                                           'quals'  "['q-bass-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-2']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  ''
                                            'date'  '2006'
                                        'comments'  ''
                                           'genre'  'synthpop'
                                             'bpm'  '89.8'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:Cover Image'                                  type PictureType.COVER_FRONT (Cover (front)) b'Cover Image'
                                     
'COMM::eng'                                         'Lb RabidRecords C'
'TALB' (Album/Movie/Show title)                     'Silent Shout'
'TBPM' (BPM (beats per minute))                     '89.8'
'TCON' (Content type, a.k.a. Genre)                 'synthpop'
'TDRC' (Recording time)                             '2006'
'TENC' (Encoded by)                                 'Lame 3.90.3'
'TIT2' (Title/songname/content description)         'Marble House'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Knife'
'TRCK' (Track number/Position in set)               '6'
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.60 dB'
'TXXX:replaygain_track_peak'                        '0.547641'

========================== row from database ==========================
                                              'id'  1538068
                                            'path'  /data/Music/Other/PrevSet/[0yay1]/The Knife/Marble House.mp3
                                         'working'  None
                                         'bitrate'  220
                                    'duration_sec'  320
                                           'genre'  synthpop
                                        'filesize'  8890032
                                           'mtime'  1662800333
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [0yay1] synthpop
                                      'tag_artist'  The Knife
                                     'tag_release'  Silent Shout
                                       'tag_title'  Marble House
                                             'bpm'  89.8
                                    'search_title'  'house':2 'marble':1
                                   'search_artist'  'knife':2 'the':1
                                  'search_release'  'shout':2 'silent':1
                                     'search_rest'  '0yay1':2,3 'prev':5 'prevset':1 'set':6 'synthpop':4
                                    'search_combo'  '0yay1':8,9 'house':2A 'knife':4B 'marble':1A 'prev':11 'prevset':7 'set':12 'shout':6C 'silent':5C 'synthpop':10 'the':3B
                                    'tag_tracknum'  6
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['q-bass-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-2']
                                      'lastfmtags'  []
                                        'tag_date'  2006
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800333.11586  (2022-09-10 10:58:53)
                             'size'  8890032