======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '231'
                                          'artist'  'Roberto Cacciapaglia'
                                     'text_people'  ''
                                         'release'  'Quarto Tempo'
                                           'title'  'Seconda navigazione'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'Q-PLAY-3', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-1', "
 "'Q-PIANO-4', 'q-chart-2', 'q-drums-1', 'q-other-2', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['contemporary classical', 'instrumental', 'piano', 'classical', 'italian']"
                                     'discogstags'  "['classical', 'neo-classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '08'
                                      'tracktotal'  ''
                                            'date'  '2007'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments-contemporary'
                                             'bpm'  '89.9'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.OTHER (Other) b''
                                     
'COMM:iTunNORM:eng'                                 (' 000003CF 00000000 00000E50 00000000 00009C6E 00000000 000065E3 00000000 '
 '0000C37E 00000000')
'TALB' (Album/Movie/Show title)                     'Quarto Tempo'
'TBPM' (BPM (beats per minute))                     '89.9'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments-contemporary'
'TDRC' (Recording time)                             '2007'
'TIT2' (Title/songname/content description)         'Seconda navigazione'
'TKEY' (Initial key)                                '10B'
'TLEN' (Length)                                     '231053'
'TPE1' (Lead performer(s)/Soloist(s))               'Roberto Cacciapaglia'
'TRCK' (Track number/Position in set)               '08'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['classical', 'neo-classical']
'TXXX:lastfmtags'                                   ['contemporary classical', 'instrumental', 'piano', 'classical', 'italian']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.43 dB'
'TXXX:replaygain_track_peak'                        '0.499623'

========================== row from database ==========================
                                              'id'  1284615
                                            'path'  /data/Music/Bulk/00instruments-classical/Roberto Cacciapaglia - Quarto Tempo/08 - Seconda navigazione.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  231
                                           'genre'  prerock-classical or classical instruments-contemporary
                                        'filesize'  9244170
                                           'mtime'  1636913681
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 08 prerock classical or classical instruments contemporary
                                      'tag_artist'  Roberto Cacciapaglia
                                     'tag_release'  Quarto Tempo
                                       'tag_title'  Seconda navigazione
                                             'bpm'  89.9
                                    'search_title'  'navigazione':2 'seconda':1
                                   'search_artist'  'cacciapaglia':2 'roberto':1
                                  'search_release'  'quarto':1 'tempo':2
                                     'search_rest'  '00instruments':1 'classical':2 'contemporary':6 'instruments':5 'or':4 'prerock':3
                                    'search_combo'  '00instruments':7 'cacciapaglia':4B 'classical':8 'contemporary':12 'instruments':11 'navigazione':2A 'or':10 'prerock':9 'quarto':5C 'roberto':3B 'seconda':1A 'tempo':6C
                                    'tag_tracknum'  8
                                      'num_images'  1
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-2', 'Q-PLAY-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['contemporary classical', 'instrumental', 'piano', 'classical', 'italian']
                                        'tag_date'  2007
                                     'discogstags'  ['classical', 'neo-classical']

============================== file details ==============================
                                           'mtime'  1636913681.319392  (2021-11-14 19:14:41)
                             'size'  9244170