======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '36'
                                          'artist'  'Pietro Grossi'
                                     'text_people'  ''
                                         'release'  'Electronic Soundtracks'
                                           'title'  'apprendista astronauta'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-2', "
 "'Q-UNU-1', 'q-syn-3', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['electronic', 'noise', 'avant garde', 'musique concrete', 'ambient']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '33'
                                      'tracktotal'  ''
                                            'date'  '1966'
                                        'comments'  ''
                                           'genre'  'soundtrack-library'
                                             'bpm'  '137.292'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            '1'
'COMM:iTunPGAP:eng'                                 '1'
'TALB' (Album/Movie/Show title)                     'Electronic Soundtracks'
'TBPM' (BPM (beats per minute))                     '137.292'
'TCON' (Content type, a.k.a. Genre)                 'soundtrack-library'
'TDRC' (Recording time)                             '1966'
'TIT2' (Title/songname/content description)         'apprendista astronauta'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'Pietro Grossi'
'TRCK' (Track number/Position in set)               '33'
'TSOA' (Album sort order)                           'Electronic Soundtracks'
'TSOP' (Performer sort order)                       'Pietro Grossi'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['electronic', 'noise', 'avant garde', 'musique concrete', 'ambient']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.49 dB'
'TXXX:replaygain_track_peak'                        '0.516217'
'TXXX:tracknum'                                     '33'

========================== row from database ==========================
                                              'id'  771121
                                            'path'  /data/Music/Bulk/0soundtrack/electronic soundtracks/33 apprendista astronauta.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  36
                                           'genre'  soundtrack-library
                                        'filesize'  1468010
                                           'mtime'  1636923313
                                   'redo_metaread'  0
                                        'rest_str'   0soundtrack electronic soundtracks 33 soundtrack library
                                      'tag_artist'  Pietro Grossi
                                     'tag_release'  Electronic Soundtracks
                                       'tag_title'  apprendista astronauta
                                             'bpm'  137.292
                                    'search_title'  'apprendista':1 'astronauta':2
                                   'search_artist'  'grossi':2 'pietro':1
                                  'search_release'  'electronic':1 'soundtracks':2
                                     'search_rest'  '0soundtrack':1 '33':4 'electronic':2 'library':6 'soundtrack':5 'soundtracks':3
                                    'search_combo'  '0soundtrack':7 '33':10 'apprendista':1A 'astronauta':2A 'electronic':5C,8 'grossi':4B 'library':12 'pietro':3B 'soundtrack':11 'soundtracks':6C,9
                                    'tag_tracknum'  33
                                      'num_images'  1
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-3', 'q-chart-1', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['electronic', 'noise', 'avant garde', 'musique concrete', 'ambient']
                                        'tag_date'  1966
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1636923312.8241858  (2021-11-14 21:55:12)
                             'size'  1468010