======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '156'
                                          'artist'  'Maurice Larcange'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Accordion tyrol'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'summer', 'accordeon', 'french', 'accordion']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'mi-accordeon'
                                             'bpm'  '119.546'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            ' 000008D0 00000CEE 00001DA3 00'
'COMM:iTunNORM:eng'                                 (' 000008D0 00000CEE 00001DA3 00003E19 00004E37 0000755E 00005C75 000070FB '
 '00004E20 00004E37')
'TBPM' (BPM (beats per minute))                     '119.546'
'TCON' (Content type, a.k.a. Genre)                 'mi-accordeon'
'TIT2' (Title/songname/content description)         'Accordion tyrol'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Maurice Larcange'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['instrumental', 'summer', 'accordeon', 'french', 'accordion']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+3.16 dB'
'TXXX:replaygain_track_peak'                        '0.440306'

========================== row from database ==========================
                                              'id'  935420
                                            'path'  /data/Music/Bulk/00localcharacter/00mid-north-europe/00french/Accordeón alegre/Maurice Larcange -Accordion tyrol.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  156
                                           'genre'  mi-accordeon
                                        'filesize'  2507210
                                           'mtime'  1620528262
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00mid north europe 00french Accordeón alegre mi accordeon
                                      'tag_artist'  Maurice Larcange
                                     'tag_release'  None
                                       'tag_title'  Accordion tyrol
                                             'bpm'  119.546
                                    'search_title'  'accordion':1 'tyrol':2
                                   'search_artist'  'larcange':2 'maurice':1
                                  'search_release'  
                                     'search_rest'  '00french':4 '00mid':1 'accordeon':5,6 'alegre':7 'europe':3 'mi':8 'north':2
                                    'search_combo'  '00french':8 '00mid':5 'accordeon':9,10 'accordion':1A 'alegre':11 'europe':7 'larcange':4B 'maurice':3B 'mi':12 'north':6 'tyrol':2A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', '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-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['instrumental', 'summer', 'accordeon', 'french', 'accordion']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528261.609674  (2021-05-09 04:44:21)
                             'size'  2507210