======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '279'
                                          'artist'  'Jelly Roll Morton'
                                     'text_people'  ''
                                         'release'  'Jelly Roll Morton'
                                           'title'  'fig leaf rag'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'Q-PLAY-2', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', "
 "'Q-PIANO-4', 'q-chart-2', 'q-drums-1', 'q-other-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['new orleans', 'ragtime', 'jazz', 'piano', 'blues']"
                                     'discogstags'  "['jazz', 'blues', 'ragtime', 'dixieland', 'piano blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-o-ragtime'
                                             'bpm'  '127.766'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'PRIV:AverageLevel:û\r\x00\x00'                     PRIV(owner='AverageLevel', data=b'\xfb\r\x00\x00')
'PRIV:PeakValue:þ\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xfe\x7f\x00\x00')
'TALB' (Album/Movie/Show title)                     'Jelly Roll Morton'
'TBPM' (BPM (beats per minute))                     '127.766'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-o-ragtime'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         'fig leaf rag'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Jelly Roll Morton'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['jazz', 'blues', 'ragtime', 'dixieland', 'piano blues']
'TXXX:lastfmtags'                                   ['new orleans', 'ragtime', 'jazz', 'piano', 'blues']
'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'                                      '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.70 dB'
'TXXX:replaygain_track_peak'                        '0.715642'

========================== row from database ==========================
                                              'id'  1523763
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/30_s collection/jelly roll morton and his red hot peppers - fig leaf rag.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  279
                                           'genre'  prerock-jb-jazz-o-ragtime
                                        'filesize'  4490017
                                           'mtime'  1620573978
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 30_s collection jelly roll morton and his red hot peppers prerock jb jazz ragtime
                                      'tag_artist'  Jelly Roll Morton
                                     'tag_release'  Jelly Roll Morton
                                       'tag_title'  fig leaf rag
                                             'bpm'  127.766
                                    'search_title'  'fig':1 'leaf':2 'rag':3
                                   'search_artist'  'jelly':1 'morton':3 'roll':2
                                  'search_release'  'jelly':1 'morton':3 'roll':2
                                     'search_rest'  '30':5 'and':11 'collection':7 'country':4 'exotica':2 'his':12 'hot':14 'jazz':1 'jb':17 'jelly':8 'morton':10 'oldies':3 'peppers':15 'prerock':16 'ragtime':18 'red':13 'roll':9 's':6
                                    'search_combo'  '30':14 'and':20 'collection':16 'country':13 'exotica':11 'fig':1A 'his':21 'hot':23 'jazz':10 'jb':26 'jelly':4B,7C,17 'leaf':2A 'morton':6B,9C,19 'oldies':12 'peppers':24 'prerock':25 'rag':3A 'ragtime':27 'red':22 'roll':5B,8C,18 's':15
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['new orleans', 'ragtime', 'jazz', 'piano', 'blues']
                                        'tag_date'  1935
                                     'discogstags'  ['jazz', 'blues', 'ragtime', 'dixieland', 'piano blues']

============================== file details ==============================
                                           'mtime'  1620573978.1429749  (2021-05-09 17:26:18)
                             'size'  4490017