======================== unified (from filesystem) ========================
                                         'bitrate'  '195.614'
                                        'duration'  '202'
                                          'artist'  'R.I.O.'
                                     'text_people'  ''
                                         'release'  'Dance Mania 2009'
                                           'title'  'When The Sun Comes Down'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-3', 'Q-UNU-1', 'q-syn-2', 'q-bass-3', "
 "'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', 'q-drums-4', 'q-other-2', "
 "'q-piano-1', 'q-vocals-3', 'Q-HHRNBTT-1', 'q-mixbeat-3', 'Q-LOCALNESS-1']")
                                      'lastfmtags'  "['house', 'dance', 'electronic', 'electro house', 'electro']"
                                     'discogstags'  "['house', 'electronic', 'euro house', 'italodance']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '2008'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio'
                                             'bpm'  '128.008'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:iTunNORM:eng'                                 (' 0000101E 00000F9B 000066F0 00006691 00020845 0001311F 00008000 00008000 '
 '00007BE6 00007D59')
'TALB' (Album/Movie/Show title)                     'Dance Mania 2009'
'TBPM' (BPM (beats per minute))                     '128.008'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio'
'TDRC' (Recording time)                             '2008'
'TIT2' (Title/songname/content description)         'When The Sun Comes Down'
'TKEY' (Initial key)                                '4A'
'TLAN' (Language(s))                                'English'
'TPE1' (Lead performer(s)/Soloist(s))               'R.I.O.'
'TPE2' (Band/orchestra/accompaniment)               'R.I.O.'
'TRCK' (Track number/Position in set)               '2'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['house', 'electronic', 'euro house', 'italodance']
'TXXX:lastfmtags'                                   ['house', 'dance', 'electronic', 'electro house', 'electro']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-2.16 dB'
'TXXX:replaygain_track_peak'                        '0.482210'

========================== row from database ==========================
                                              'id'  1304802
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/top, dance, club, best of, etc/2-r i o -when_the_sun_comes_down.mp3
                                         'working'  None
                                         'bitrate'  195
                                    'duration_sec'  202
                                           'genre'  electronic-generic or radio
                                        'filesize'  4961555
                                           'mtime'  1621696835
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted top, dance, club, best of, etc r when_the_sun_comes_down electronic generic or radio
                                      'tag_artist'  R.I.O.
                                     'tag_release'  Dance Mania 2009
                                       'tag_title'  When The Sun Comes Down
                                             'bpm'  128.008
                                    'search_title'  'comes':4 'down':5 'sun':3 'the':2 'when':1
                                   'search_artist'  'i':2 'o':3 'r':1 'rio':4
                                  'search_release'  '2009':3 'dance':1 'mania':2
                                     'search_rest'  '00poprockelectronic':1 'best':9 'club':7,8 'comes':17 'dance':5,6 'down':18 'electronic':19 'etc':12 'generic':20 'of':10,11 'or':21 'r':13 'radio':22 'sun':16 'the':15 'top':3,4 'unsorted':2 'when':14
                                    'search_combo'  '00poprockelectronic':13 '2009':12C 'best':21 'club':19,20 'comes':4A,29 'dance':10C,17,18 'down':5A,30 'electronic':31 'etc':24 'generic':32 'i':7B 'mania':11C 'o':8B 'of':22,23 'or':33 'r':6B,25 'radio':34 'rio':9B 'sun':3A,28 'the':2A,27 'top':15,16 'unsorted':14 'when':1A,26
                                    'tag_tracknum'  2
                                      'num_images'  1
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-3', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['house', 'dance', 'electronic', 'electro house', 'electro']
                                        'tag_date'  2008
                                     'discogstags'  ['house', 'electronic', 'euro house', 'italodance']

============================== file details ==============================
                                           'mtime'  1621696834.654202  (2021-05-22 17:20:34)
                             'size'  4961555