======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '265'
                                          'artist'  'Bocelli'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Vivo per lei'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['classical', 'opera', 'italian', 'male vocalists', 'andrea bocelli']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '138.6'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '138.6'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TIT2' (Title/songname/content description)         'Vivo per lei'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Bocelli'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['classical', 'opera', 'italian', 'male vocalists', 'andrea bocelli']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.36 dB'
'TXXX:replaygain_track_peak'                        '0.523141'

========================== row from database ==========================
                                              'id'  1213884
                                            'path'  /data/Music/Bulk/00instruments-classical/bocelli-vivo_per_lei.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  265
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  4247420
                                           'mtime'  1620561913
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical bocelli vivo_per_lei prerock classical or classical instruments
                                      'tag_artist'  Bocelli
                                     'tag_release'  None
                                       'tag_title'  Vivo per lei
                                             'bpm'  138.6
                                    'search_title'  'lei':3 'per':2 'vivo':1
                                   'search_artist'  'bocelli':1
                                  'search_release'  
                                     'search_rest'  '00instruments':1 'bocelli':3 'classical':2 'instruments':9 'lei':6 'or':8 'per':5 'prerock':7 'vivo':4
                                    'search_combo'  '00instruments':5 'bocelli':4B,7 'classical':6 'instruments':13 'lei':3A,10 'or':12 'per':2A,9 'prerock':11 'vivo':1A,8
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-2', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['classical', 'opera', 'italian', 'male vocalists', 'andrea bocelli']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561913.0963094  (2021-05-09 14:05:13)
                             'size'  4247420