======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '253'
                                          'artist'  'Marie Rappold'
                                     'text_people'  ''
                                         'release'  'Edison Amberol 28005'
                                           'title'  'Ave Maria (Gounod) (violin - Albert Spalding)'
                                           '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-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['grammophon']"
                                     'discogstags'  "['opera', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1911'
                                        'comments'  ''
                                           'genre'  'prerock-vocal-opera'
                                             'bpm'  '143.314'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Edison Amberol 28005'
'TBPM' (BPM (beats per minute))                     '143.314'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal-opera'
'TDRC' (Recording time)                             '1911'
'TIT2' (Title/songname/content description)         'Ave Maria (Gounod) (violin - Albert Spalding)'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Marie Rappold'
'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:discogstags'                                  ['opera', 'classical']
'TXXX:lastfmtags'                                   'grammophon'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+3.68 dB'
'TXXX:replaygain_track_peak'                        '0.556890'

========================== row from database ==========================
                                              'id'  1434542
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1911/Marie Rappold - Ave Maria (Gounod) (violin - Albert Spalding) 1911 long version.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  253
                                           'genre'  prerock-vocal-opera
                                        'filesize'  5078834
                                           'mtime'  1621625639
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1911 1911 long version prerock vocal opera
                                      'tag_artist'  Marie Rappold
                                     'tag_release'  Edison Amberol 28005
                                       'tag_title'  Ave Maria (Gounod) (violin - Albert Spalding)
                                             'bpm'  143.314
                                    'search_title'  'albert':7 'ave':1 'gounod':3,4 'maria':2 'spalding':8,9 'violin':5,6
                                   'search_artist'  'marie':1 'rappold':2
                                  'search_release'  '28005':3 'amberol':2 'edison':1
                                     'search_rest'  '00oldiepop':5 '1911':6 'country':4 'exotica':2 'jazz':1 'long':7 'oldies':3 'opera':11 'prerock':9 'version':8 'vocal':10
                                    'search_combo'  '00oldiepop':19 '1911':20 '28005':14C 'albert':7A 'amberol':13C 'ave':1A 'country':18 'edison':12C 'exotica':16 'gounod':3A,4A 'jazz':15 'long':21 'maria':2A 'marie':10B 'oldies':17 'opera':25 'prerock':23 'rappold':11B 'spalding':8A,9A 'version':22 'violin':5A,6A 'vocal':24
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['grammophon']
                                        'tag_date'  1911
                                     'discogstags'  ['opera', 'classical']

============================== file details ==============================
                                           'mtime'  1621625638.932922  (2021-05-21 21:33:58)
                             'size'  5078834