======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '135'
                                          'artist'  'Brahms'
                                     'text_people'  ''
                                         'release'  'Brahms'
                                           'title'  'Hungarian dance nr. 5 (orkest)'
                                           '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-2', "
 "'q-chart-3', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['composers', 'electronic', 'indie', 'johannes brahms', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '137.2'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Brahms'
'TBPM' (BPM (beats per minute))                     '137.2'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TIT2' (Title/songname/content description)         'Hungarian dance nr. 5 (orkest)'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Brahms'
'TRCK' (Track number/Position in set)               '5'
'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'                                   ['composers', 'electronic', 'indie', 'johannes brahms', 'classical']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.88 dB'
'TXXX:replaygain_track_peak'                        '0.754817'

========================== row from database ==========================
                                              'id'  1213764
                                            'path'  /data/Music/Bulk/00instruments-classical/Brahms/Brahms - hungarian dance nr. 5 (orkest).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  135
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  2166978
                                           'mtime'  1620561482
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical hungarian prerock classical classical instruments
                                      'tag_artist'  Brahms
                                     'tag_release'  Brahms
                                       'tag_title'  Hungarian dance nr. 5 (orkest)
                                             'bpm'  137.2
                                    'search_title'  '5':5 'dance':2 'hungarian':1 'nr':3,4 'orkest':6,7
                                   'search_artist'  'brahms':1
                                  'search_release'  'brahms':1
                                     'search_rest'  '00instruments':1 'classical':2 'hungarian':3 'instruments':5 'prerock':4
                                    'search_combo'  '00instruments':10 '5':5A 'brahms':8B,9C 'classical':11 'dance':2A 'hungarian':1A,12 'instruments':14 'nr':3A,4A 'orkest':6A,7A 'prerock':13
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-3', 'q-syn-1', 'q-chart-3', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['composers', 'electronic', 'indie', 'johannes brahms', 'classical']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561481.702663  (2021-05-09 13:58:01)
                             'size'  2166978