======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '455'
                                          'artist'  'Trúbrot'
                                     'text_people'  ''
                                         'release'  'Undir Áhrifum'
                                           'title'  'Stjörnuryk'
                                           'quals'  ("['Q-OLDST-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-SYN-2', 'Q-BUSY-3', 'Q-GRIT-2', 'Q-PLAY-3', 'q-bass-4', 'Q-CHART-2', "
 "'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-3', 'Q-MIXBEAT-2']")
                                      'lastfmtags'  ("['psychedelic rock', 'progressive rock', 'progressive', 'psychedelic', "
 "'iceland']")
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '08'
                                      'tracktotal'  ''
                                            'date'  '1970'
                                        'comments'  ''
                                           'genre'  'rock-cppex'
                                             'bpm'  '133.8'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Undir Áhrifum'
'TBPM' (BPM (beats per minute))                     '133.8'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex'
'TDRC' (Recording time)                             '1970'
'TIT2' (Title/songname/content description)         'Stjörnuryk'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Trúbrot'
'TPE2' (Band/orchestra/accompaniment)               'Trúbrot'
'TRCK' (Track number/Position in set)               '08'
'TXXX:Q-BUSY'                                       '3'
'TXXX:Q-CHART'                                      '2'
'TXXX:Q-GRIT'                                       '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-MIXBEAT'                                    '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-SYN'                                        '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['psychedelic rock',
 'progressive rock',
 'progressive',
 'psychedelic',
 'iceland']
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.33 dB'
'TXXX:replaygain_track_peak'                        '1.013368'

========================== row from database ==========================
                                              'id'  1478687
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Trúbrot [1970] Undir Áhrifum/08. Stjörnuryk.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  455
                                           'genre'  rock-cppex
                                        'filesize'  18306224
                                           'mtime'  1620736778
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy [1970] 08. rock cppex
                                      'tag_artist'  Trúbrot
                                     'tag_release'  Undir Áhrifum
                                       'tag_title'  Stjörnuryk
                                             'bpm'  133.8
                                    'search_title'  'stjornuryk':1,2
                                   'search_artist'  'trubrot':1,2
                                  'search_release'  'ahrifum':2,3 'undir':1
                                     'search_rest'  '08':4,5 '1970':2,3 'classicprogpsy':1 'cppex':7 'rock':6
                                    'search_combo'  '08':11,12 '1970':9,10 'ahrifum':6C,7C 'classicprogpsy':8 'cppex':14 'rock':13 'stjornuryk':1A,2A 'trubrot':3B,4B 'undir':5C
                                    'tag_tracknum'  8
                                      'num_images'  1
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'Q-MIXBEAT-2', 'Q-OLDST-2', 'Q-GRIT-2', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-CHART-2', 'q-drums-1', 'Q-SYN-2', 'q-other-3', 'Q-BUSY-3', 'Q-PLAY-3', 'q-bass-4']
                                      'lastfmtags'  ['psychedelic rock', 'progressive rock', 'progressive', 'psychedelic', 'iceland']
                                        'tag_date'  1970
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620736777.5062172  (2021-05-11 14:39:37)
                             'size'  18306224