======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '189'
                                          'artist'  'Georg Friedrich Händel'
                                     'text_people'  ''
                                         'release'  'Baroque Masterclass'
                                           'title'  'Saul: Dead March'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-2', '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-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['composers', 'german', 'baroque', 'instrumental', 'classical']"
                                     'discogstags'  "['classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '16'
                                      'tracktotal'  ''
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '143.314'
                                             'key'  '2B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Baroque Masterclass'
'TBPM' (BPM (beats per minute))                     '143.314'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '2004'
'TIT2' (Title/songname/content description)         'Saul: Dead March'
'TKEY' (Initial key)                                '2B'
'TPE1' (Lead performer(s)/Soloist(s))               'Georg Friedrich Händel'
'TRCK' (Track number/Position in set)               '16'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'classical'
'TXXX:lastfmtags'                                   ['composers', 'german', 'baroque', 'instrumental', 'classical']
'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'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.37 dB'
'TXXX:replaygain_track_peak'                        '0.745060'

========================== row from database ==========================
                                              'id'  192677
                                            'path'  /data/Music/Bulk/00instruments-classical/Unsorted/04 - dead march from soul.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  189
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  6071651
                                           'mtime'  1620561854
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Unsorted 04 dead march from soul prerock classical classical instruments
                                      'tag_artist'  Georg Friedrich Händel
                                     'tag_release'  Baroque Masterclass
                                       'tag_title'  Saul: Dead March
                                             'bpm'  143.314
                                    'search_title'  'dead':3 'march':4 'saul':1,2
                                   'search_artist'  'friedrich':2 'georg':1 'handel':3,4
                                  'search_release'  'baroque':1 'masterclass':2
                                     'search_rest'  '00instruments':1 'classical':2 'dead':4 'from':6 'instruments':9 'march':5 'prerock':8 'soul':7 'unsorted':3
                                    'search_combo'  '00instruments':11 'baroque':9C 'classical':12 'dead':3A,14 'friedrich':6B 'from':16 'georg':5B 'handel':7B,8B 'instruments':19 'march':4A,15 'masterclass':10C 'prerock':18 'saul':1A,2A 'soul':17 'unsorted':13
                                    'tag_tracknum'  16
                                      'num_images'  0
                                             'key'  2B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', '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'  ['composers', 'german', 'baroque', 'instrumental', 'classical']
                                        'tag_date'  2004
                                     'discogstags'  ['classical']

============================== file details ==============================
                                           'mtime'  1620561854.286172  (2021-05-09 14:04:14)
                             'size'  6071651