======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '213'
                                          'artist'  'Robert Wilkins'
                                     'text_people'  ''
                                         'release'  'DOCD 5014 - Memphis Blues (1928-1935)'
                                           'title'  'Jail House Blues'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-3', 'Q-LOCALNESS-3', '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-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['memphis blues', 'blues', 'delta blues', 'folk', 'old blues']"
                                     'discogstags'  "['blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  '22'
                                            'date'  '1930'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '134.021'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'DOCD 5014 - Memphis Blues (1928-1935)'
'TBPM' (BPM (beats per minute))                     '134.021'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TDRC' (Recording time)                             '1930'
'TIT2' (Title/songname/content description)         'Jail House Blues'
'TKEY' (Initial key)                                '7B'
'TLEN' (Length)                                     '213368'
'TPE1' (Lead performer(s)/Soloist(s))               'Robert Wilkins'
'TRCK' (Track number/Position in set)               '3/22'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'blues'
'TXXX:lastfmtags'                                   ['memphis blues', 'blues', 'delta blues', 'folk', 'old blues']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.53 dB'
'TXXX:replaygain_track_peak'                        '0.531118'

========================== row from database ==========================
                                              'id'  676062
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Wilkins, Robert - Memphis Blues 1928-1935/03 Jail House Blues.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  213
                                           'genre'  prerock-jb-blues
                                        'filesize'  3415936
                                           'mtime'  1620402707
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Wilkins, 03 prerock jb blues
                                      'tag_artist'  Robert Wilkins
                                     'tag_release'  DOCD 5014 - Memphis Blues (1928-1935)
                                       'tag_title'  Jail House Blues
                                             'bpm'  134.021
                                    'search_title'  'blues':3 'house':2 'jail':1
                                   'search_artist'  'robert':1 'wilkins':2
                                  'search_release'  '1928':5 '19281935':7 '1935':6 '5014':2 'blues':4 'docd':1 'memphis':3
                                     'search_rest'  'blues':9 'country':4 'exotica':2 'jazz':1 'jb':8 'oldies':3 'prerock':7 'wilkins':5,6
                                    'search_combo'  '1928':10C '19281935':12C '1935':11C '5014':7C 'blues':3A,9C,21 'country':16 'docd':6C 'exotica':14 'house':2A 'jail':1A 'jazz':13 'jb':20 'memphis':8C 'oldies':15 'prerock':19 'robert':4B 'wilkins':5B,17,18
                                    'tag_tracknum'  3
                                      'num_images'  1
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['memphis blues', 'blues', 'delta blues', 'folk', 'old blues']
                                        'tag_date'  1930
                                     'discogstags'  ['blues']

============================== file details ==============================
                                           'mtime'  1620402706.913053  (2021-05-07 17:51:46)
                             'size'  3415936