======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '227'
                                          'artist'  'Piero Umiliani'
                                     'text_people'  ''
                                         'release'  'Il Corpo (Colonna Sonora Del Film)'
                                           'title'  'Free life (ext)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-UNU-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['lounge', 'jazz', 'easy listening', 'soundtrack', 'instrumental', 'italian']"
                                     'discogstags'  "['jazz', 'stage & screen', 'soundtrack', 'jazz-funk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  '21'
                                            'date'  '1974'
                                        'comments'  ''
                                           'genre'  'soundtrack-video;prerock-jb-jazz-lounge or exotica or bossa'
                                             'bpm'  '139.178'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Il Corpo (Colonna Sonora Del Film)'
'TBPM' (BPM (beats per minute))                     '139.178'
'TCON' (Content type, a.k.a. Genre)                 ['soundtrack-video', 'prerock-jb-jazz-lounge or exotica or bossa']
'TDRC' (Recording time)                             '1974'
'TIT2' (Title/songname/content description)         'Free life (ext)'
'TKEY' (Initial key)                                '7B'
'TLEN' (Length)                                     '227395'
'TPE1' (Lead performer(s)/Soloist(s))               'Piero Umiliani'
'TRCK' (Track number/Position in set)               '13/21'
'TSOP' (Performer sort order)                       'Umiliani Piero'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['jazz', 'stage & screen', 'soundtrack', 'jazz-funk']
'TXXX:lastfmtags'                                   ['lounge', 'jazz', 'easy listening', 'soundtrack', 'instrumental', 'italian']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.31 dB'
'TXXX:replaygain_track_peak'                        '0.500496'

========================== row from database ==========================
                                              'id'  746210
                                            'path'  /data/Music/Bulk/0soundtrack/Il Corpo (Colonna Sonora Del Film)/13 Free life (ext).mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  227
                                           'genre'  soundtrack-video;prerock-jb-jazz-lounge or exotica or bossa
                                        'filesize'  4572816
                                           'mtime'  1620541795
                                   'redo_metaread'  0
                                        'rest_str'   0soundtrack 13 soundtrack video;prerock jb jazz lounge exotica bossa
                                      'tag_artist'  Piero Umiliani
                                     'tag_release'  Il Corpo (Colonna Sonora Del Film)
                                       'tag_title'  Free life (ext)
                                             'bpm'  139.178
                                    'search_title'  'ext':3,4 'free':1 'life':2
                                   'search_artist'  'piero':1 'umiliani':2
                                  'search_release'  'colonna':3,4 'corpo':2 'del':6 'film':7,8 'il':1 'sonora':5
                                     'search_rest'  '0soundtrack':1 'bossa':11 'exotica':10 'jazz':8 'jb':7 'lounge':9 'prerock':4,6 'soundtrack':2 'video':3,5
                                    'search_combo'  '0soundtrack':15 'bossa':25 'colonna':9C,10C 'corpo':8C 'del':12C 'exotica':24 'ext':3A,4A 'film':13C,14C 'free':1A 'il':7C 'jazz':22 'jb':21 'life':2A 'lounge':23 'piero':5B 'prerock':18,20 'sonora':11C 'soundtrack':16 'umiliani':6B 'video':17,19
                                    'tag_tracknum'  13
                                      'num_images'  1
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-2', 'q-chart-3', 'q-other-4', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['lounge', 'jazz', 'easy listening', 'soundtrack', 'instrumental', 'italian']
                                        'tag_date'  1974
                                     'discogstags'  ['jazz', 'stage & screen', 'soundtrack', 'jazz-funk']

============================== file details ==============================
                                           'mtime'  1620541794.8692489  (2021-05-09 08:29:54)
                             'size'  4572816