======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '196'
                                          'artist'  'Louis Armstrong & Ma Rainey'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Jelly Bean Blues'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted;set-th-candy'
                                             'bpm'  '144.955'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'PRIV:AverageLevel:{\t\x00\x00'                     PRIV(owner='AverageLevel', data=b'{\t\x00\x00')
'PRIV:PeakValue:!v\x00\x00'                         PRIV(owner='PeakValue', data=b'!v\x00\x00')
'TBPM' (BPM (beats per minute))                     '144.955'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-jb-jazz-unsorted', 'set-th-candy']
'TIT2' (Title/songname/content description)         'Jelly Bean Blues'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'Louis Armstrong & Ma Rainey'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.09 dB'
'TXXX:replaygain_track_peak'                        '0.460788'

========================== row from database ==========================
                                              'id'  735767
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/sweets/Louis Armstrong & Ma Rainey - Jelly Bean Blues (1924).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  196
                                           'genre'  prerock-jb-jazz-unsorted;set-th-candy
                                        'filesize'  4723691
                                           'mtime'  1620538097
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country sweets (1924) prerock jb jazz unsorted;set th candy
                                      'tag_artist'  Louis Armstrong & Ma Rainey
                                     'tag_release'  None
                                       'tag_title'  Jelly Bean Blues
                                             'bpm'  144.955
                                    'search_title'  'bean':2 'blues':3 'jelly':1
                                   'search_artist'  'armstrong':2 'louis':1 'ma':3 'rainey':4
                                  'search_release'  
                                     'search_rest'  '1924':6,7 'candy':15 'country':4 'exotica':2 'jazz':1 'jb':9 'oldies':3 'prerock':8 'set':11,13 'sweets':5 'th':14 'unsorted':10,12
                                    'search_combo'  '1924':13,14 'armstrong':5B 'bean':2A 'blues':3A 'candy':22 'country':11 'exotica':9 'jazz':8 'jb':16 'jelly':1A 'louis':4B 'ma':6B 'oldies':10 'prerock':15 'rainey':7B 'set':18,20 'sweets':12 'th':21 'unsorted':17,19
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620538096.7825377  (2021-05-09 07:28:16)
                             'size'  4723691