======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '362'
                                          'artist'  'Sarah  Vaughan'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Misty'
                                           'quals'  "['q-bass-3', 'q-drums-1', 'q-other-2', 'q-piano-2', 'q-vocals-4']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  '16'
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  ''
                                             'bpm'  '121.4'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'COMM:iTunNORM:eng'                                 (' 000001BB 0000006F 000030D8 00000C02 00055B1F 00050449 000052EF 000046A1 '
 '00053200 00053200')
'COMM:iTunes_CDDB_1:eng'                            'F00DA310+262007+16+182+10662+21702+42210+56200+67280+84207+104840+117340+128907+152727+171462+185430+199940+223620+250795'
'COMM:iTunes_CDDB_TrackNumber:eng'                  '15'
'TBPM' (BPM (beats per minute))                     '121.4'
'TENC' (Encoded by)                                 'iTunes v4.2.0.72'
'TIT2' (Title/songname/content description)         'Misty'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Sarah  Vaughan'
'TRCK' (Track number/Position in set)               '15/16'
'TXXX:q-bass'                                       '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '2'
'TXXX:q-vocals'                                     '4'

========================== row from database ==========================
                                              'id'  1538702
                                            'path'  /data/Music/Other/PrevSet/[5jazz, blues]/Sarah Vaughan - Misty.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  362
                                           'genre'  
                                        'filesize'  7250260
                                           'mtime'  1662800451
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [5jazz, blues]
                                      'tag_artist'  Sarah  Vaughan
                                     'tag_release'  None
                                       'tag_title'  Misty
                                             'bpm'  121.4
                                    'search_title'  'misty':1
                                   'search_artist'  'sarah':1 'vaughan':2
                                  'search_release'  
                                     'search_rest'  '5jazz':2,3 'blues':4,5 'prev':6 'prevset':1 'set':7
                                    'search_combo'  '5jazz':5,6 'blues':7,8 'misty':1A 'prev':9 'prevset':4 'sarah':2B 'set':10 'vaughan':3B
                                    'tag_tracknum'  15
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['q-bass-3', 'q-drums-1', 'q-other-2', 'q-piano-2', 'q-vocals-4']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800450.632067  (2022-09-10 11:00:50)
                             'size'  7250260