======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '147'
                                          'artist'  'The Knife'
                                     'text_people'  ''
                                         'release'  'Silent Shout'
                                           'title'  'Na Na Na'
                                           'quals'  "['q-bass-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  ''
                                            'date'  '2006'
                                        'comments'  ''
                                           'genre'  'synthpop'
                                             'bpm'  '93.3'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'APIC:Cover Image'                                  type PictureType.COVER_FRONT (Cover (front)) b'Cover Image'
                                     
'TALB' (Album/Movie/Show title)                     'Silent Shout'
'TBPM' (BPM (beats per minute))                     '93.3'
'TCON' (Content type, a.k.a. Genre)                 'synthpop'
'TDRC' (Recording time)                             '2006'
'TIT2' (Title/songname/content description)         'Na Na Na'
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Knife'
'TPE2' (Band/orchestra/accompaniment)               'The Knife'
'TPOS' (Part of a set)                              '1'
'TRCK' (Track number/Position in set)               '5'
'TXXX:q-bass'                                       '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.69 dB'
'TXXX:replaygain_track_peak'                        '0.471564'

========================== row from database ==========================
                                              'id'  1538327
                                            'path'  /data/Music/Other/PrevSet/[0yay1]/The Knife/Na Na Na.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  147
                                           'genre'  synthpop
                                        'filesize'  3605560
                                           'mtime'  1662800336
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [0yay1] synthpop
                                      'tag_artist'  The Knife
                                     'tag_release'  Silent Shout
                                       'tag_title'  Na Na Na
                                             'bpm'  93.3
                                    'search_title'  'na':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':7,8 'knife':3B 'na':1A 'prev':10 'prevset':6 'set':11 'shout':5C 'silent':4C 'synthpop':9 'the':2B
                                    'tag_tracknum'  5
                                      'num_images'  1
                                             'key'  8B
                                           'quals'  ['q-bass-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3']
                                      'lastfmtags'  []
                                        'tag_date'  2006
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800336.3917544  (2022-09-10 10:58:56)
                             'size'  3605560