======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '566'
                                          'artist'  'Wolfgang Amadeus Mozart'
                                     'text_people'  ''
                                         'release'  'Disc B'
                                           'title'  'Andante cantabile'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', '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'  "['instrumental', 'composers', 'piano', 'classical', 'classic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '139.8'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Disc B'
'TBPM' (BPM (beats per minute))                     '139.8'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '1999'
'TIT2' (Title/songname/content description)         'Andante cantabile'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Wolfgang Amadeus Mozart'
'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'                                   ['instrumental', 'composers', 'piano', 'classical', 'classic']
'TXXX:q-bass'                                       '1'
'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'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.82 dB'
'TXXX:replaygain_track_peak'                        '0.858773'

========================== row from database ==========================
                                              'id'  1214291
                                            'path'  /data/Music/Bulk/00instruments-classical/Mozart/Mozart_-_Andante_cantabile.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  566
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  9074224
                                           'mtime'  1620561662
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Mozart_ _Andante_cantabile prerock classical or classical instruments
                                      'tag_artist'  Wolfgang Amadeus Mozart
                                     'tag_release'  Disc B
                                       'tag_title'  Andante cantabile
                                             'bpm'  139.8
                                    'search_title'  'andante':1 'cantabile':2
                                   'search_artist'  'amadeus':2 'mozart':3 'wolfgang':1
                                  'search_release'  'b':2 'disc':1
                                     'search_rest'  '00instruments':1 'andante':4 'cantabile':5 'classical':2 'instruments':8 'mozart':3 'or':7 'prerock':6
                                    'search_combo'  '00instruments':8 'amadeus':4B 'andante':1A,11 'b':7C 'cantabile':2A,12 'classical':9 'disc':6C 'instruments':15 'mozart':5B,10 'or':14 'prerock':13 'wolfgang':3B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'composers', 'piano', 'classical', 'classic']
                                        'tag_date'  1999
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561661.8258233  (2021-05-09 14:01:01)
                             'size'  9074224