======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '185'
                                          'artist'  'Franz Liszt'
                                     'text_people'  ''
                                         'release'  'Liszt - Complete Hungarian Rha'
                                           'title'  'No. 17 in D minor'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'Q-PLAY-3', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', "
 "'Q-PIANO-4', 'q-chart-3', 'q-drums-1', 'q-other-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['composers', 'piano', 'hungarian', 'romantic', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '17'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '90.4'
                                             'key'  '12A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Liszt - Complete Hungarian Rha'
'TBPM' (BPM (beats per minute))                     '90.4'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TIT2' (Title/songname/content description)         'No. 17 in D minor'
'TKEY' (Initial key)                                '12A'
'TPE1' (Lead performer(s)/Soloist(s))               'Franz Liszt'
'TRCK' (Track number/Position in set)               '17'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['composers', 'piano', 'hungarian', 'romantic', 'classical']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.49 dB'
'TXXX:replaygain_track_peak'                        '0.672201'

========================== row from database ==========================
                                              'id'  1213773
                                            'path'  /data/Music/Bulk/00instruments-classical/Liszt/Complete Hungarian Rhapsodies/Franz Liszt - No. 17 in D minor.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  185
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  2970244
                                           'mtime'  1620574189
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Rhapsodies prerock classical classical instruments
                                      'tag_artist'  Franz Liszt
                                     'tag_release'  Liszt - Complete Hungarian Rha
                                       'tag_title'  No. 17 in D minor
                                             'bpm'  90.4
                                    'search_title'  'd':4 'in':3 'minor':5 'no':1,2
                                   'search_artist'  'franz':1 'liszt':2
                                  'search_release'  'complete':2 'hungarian':3 'liszt':1 'rha':4
                                     'search_rest'  '00instruments':1 'classical':2 'instruments':5 'prerock':4 'rhapsodies':3
                                    'search_combo'  '00instruments':12 'classical':13 'complete':9C 'd':4A 'franz':6B 'hungarian':10C 'in':3A 'instruments':16 'liszt':7B,8C 'minor':5A 'no':1A,2A 'prerock':15 'rha':11C 'rhapsodies':14
                                    'tag_tracknum'  17
                                      'num_images'  0
                                             'key'  12A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-1', 'Q-HAP-3', 'Q-PLAY-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['composers', 'piano', 'hungarian', 'romantic', 'classical']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620574188.8917627  (2021-05-09 17:29:48)
                             'size'  2970244