======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '241'
                                          'artist'  'Elton John'
                                     'text_people'  ''
                                         'release'  '?'
                                           'title'  '(Elton John)-Something About the Way You Look Tonight'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-UNU-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['rock', 'singer songwriter', 'piano', 'pop', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '00'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '142.809'
                                             'key'  '2B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '?'
'TBPM' (BPM (beats per minute))                     '142.809'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TIT2' (Title/songname/content description)         '(Elton John)-Something About the Way You Look Tonight'
'TKEY' (Initial key)                                '2B'
'TLEN' (Length)                                     '241000'
'TPE1' (Lead performer(s)/Soloist(s))               'Elton John'
'TRCK' (Track number/Position in set)               '00'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['rock', 'singer songwriter', 'piano', 'pop', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.39 dB'
'TXXX:replaygain_track_peak'                        '0.587198'

========================== row from database ==========================
                                              'id'  1350305
                                            'path'  /data/Music/Bulk/00poprockelectronic/Elton John/Elton John - Something About the Way You Look Tonight.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  241
                                           'genre'  rock-cppex-classic
                                        'filesize'  3860587
                                           'mtime'  1636039170
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic rock cppex classic
                                      'tag_artist'  Elton John
                                     'tag_release'  ?
                                       'tag_title'  (Elton John)-Something About the Way You Look Tonight
                                             'bpm'  142.809
                                    'search_title'  'about':6 'elton':1,2 'john':3 'johnsomething':5 'look':10 'something':4 'the':7 'tonight':11 'way':8 'you':9
                                   'search_artist'  'elton':1 'john':2
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'classic':4 'cppex':3 'rock':2
                                    'search_combo'  '00poprockelectronic':14 'about':6A 'classic':17 'cppex':16 'elton':1A,2A,12B 'john':3A,13B 'johnsomething':5A 'look':10A 'rock':15 'something':4A 'the':7A 'tonight':11A 'way':8A 'you':9A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  2B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['rock', 'singer songwriter', 'piano', 'pop', 'classic rock']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636039170.432732  (2021-11-04 16:19:30)
                             'size'  3860587