======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '137'
                                          'artist'  'Jelly Roll Morton'
                                     'text_people'  ''
                                         'release'  'Jelly Roll Morton'
                                           'title'  'classic jazz'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-2', "
 "'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'  '89.890'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Jelly Roll Morton'
'TBPM' (BPM (beats per minute))                     '89.890'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-o-ragtime'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         'classic jazz'
'TKEY' (Initial key)                                '6A'
'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-UNU'                                        '1'
'TXXX:discogstags'                                  ['jazz', 'blues', 'ragtime', 'dixieland', 'piano blues']
'TXXX:lastfmtags'                                   ['new orleans', 'ragtime', 'jazz', 'piano', 'blues']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+1.22 dB'
'TXXX:replaygain_track_peak'                        '0.498730'

========================== row from database ==========================
                                              'id'  1532261
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/30_s collection/jelly roll morton and his red hot peppers - classic jazz.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  137
                                           'genre'  prerock-jb-jazz-o-ragtime
                                        'filesize'  2215432
                                           'mtime'  1620527889
                                   'redo_metaread'  0
                                        'rest_str'   00blues exotica oldies country 30_s collection jelly roll morton and his red hot peppers prerock jb ragtime
                                      'tag_artist'  Jelly Roll Morton
                                     'tag_release'  Jelly Roll Morton
                                       'tag_title'  classic jazz
                                             'bpm'  89.89
                                    'search_title'  'classic':1 'jazz':2
                                   'search_artist'  'jelly':1 'morton':3 'roll':2
                                  'search_release'  'jelly':1 'morton':3 'roll':2
                                     'search_rest'  '30':4 'and':10 'collection':6 'country':3 'exotica':1 'his':11 'hot':13 'jb':16 'jelly':7 'morton':9 'oldies':2 'peppers':14 'prerock':15 'ragtime':17 'red':12 'roll':8 's':5
                                    'search_combo'  '30':12 'and':18 'classic':1A 'collection':14 'country':11 'exotica':9 'his':19 'hot':21 'jazz':2A 'jb':24 'jelly':3B,6C,15 'morton':5B,8C,17 'oldies':10 'peppers':22 'prerock':23 'ragtime':25 'red':20 'roll':4B,7C,16 's':13
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['new orleans', 'ragtime', 'jazz', 'piano', 'blues']
                                        'tag_date'  1935
                                     'discogstags'  ['jazz', 'blues', 'ragtime', 'dixieland', 'piano blues']

============================== file details ==============================
                                           'mtime'  1620527889.1811368  (2021-05-09 04:38:09)
                             'size'  2215432