======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '170'
                                          'artist'  'Sonic Youth'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  ''
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['indie', 'alternative', 'post punk', 'experimental', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted;set-th-candy'
                                             'bpm'  '144.852'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'PRIV:AverageLevel:{\x16\x00\x00'                   PRIV(owner='AverageLevel', data=b'{\x16\x00\x00')
'PRIV:PeakValue:¡\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xa1\x7f\x00\x00')
'TBPM' (BPM (beats per minute))                     '144.852'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-jb-jazz-unsorted', 'set-th-candy']
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Sonic Youth'
'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:lastfmtags'                                   ['indie', 'alternative', 'post punk', 'experimental', 'rock']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.84 dB'
'TXXX:replaygain_track_peak'                        '0.652448'

========================== row from database ==========================
                                              'id'  735874
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/sweets/Sonic Youth - Bubblegum.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  170
                                           'genre'  prerock-jb-jazz-unsorted;set-th-candy
                                        'filesize'  2724560
                                           'mtime'  1620538101
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country sweets Bubblegum prerock jb jazz unsorted;set candy
                                      'tag_artist'  Sonic Youth
                                     'tag_release'  None
                                       'tag_title'  None
                                             'bpm'  144.852
                                    'search_title'  None
                                   'search_artist'  'sonic':1 'youth':2
                                  'search_release'  
                                     'search_rest'  'bubblegum':6 'candy':13 'country':4 'exotica':2 'jazz':1 'jb':8 'oldies':3 'prerock':7 'set':10,12 'sweets':5 'unsorted':9,11
                                    'search_combo'  'bubblegum':8 'candy':15 'country':6 'exotica':4 'jazz':3 'jb':10 'oldies':5 'prerock':9 'set':12,14 'sonic':1B 'sweets':7 'unsorted':11,13 'youth':2B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-2', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-4', 'q-piano-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'alternative', 'post punk', 'experimental', 'rock']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620538100.5725682  (2021-05-09 07:28:20)
                             'size'  2724560