======================== unified (from filesystem) ========================
                                         'bitrate'  '32.0'
                                        'duration'  '166'
                                          'artist'  "Herter's, Inc"
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'The Complete Crow Calling Record'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-experimental-oddness;mi-whistling'
                                             'bpm'  '135.0'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '135.0'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-experimental-oddness', 'mi-whistling']
'TENC' (Encoded by)                                 'Basic Hip Digital Oddio'
'TIT2' (Title/songname/content description)         'The Complete Crow Calling Record'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               "Herter's, Inc"
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.30 dB'
'TXXX:replaygain_track_peak'                        '0.443022'
'WXXX:'                                             WXXX(encoding=<Encoding.LATIN1: 0>, desc='', url='http://www.whistlingrecords.com')

========================== row from database ==========================
                                              'id'  1503080
                                            'path'  /data/Music/Bulk/00spent/Whistling/Herter_s Complete Crow Calling Record.mp3
                                         'working'  None
                                         'bitrate'  32
                                    'duration_sec'  166
                                           'genre'  electronic-experimental-oddness;mi-whistling
                                        'filesize'  667648
                                           'mtime'  1620528005
                                   'redo_metaread'  0
                                        'rest_str'   00spent Whistling Herter_s electronic experimental oddness;mi whistling
                                      'tag_artist'  Herter's, Inc
                                     'tag_release'  None
                                       'tag_title'  The Complete Crow Calling Record
                                             'bpm'  135.0
                                    'search_title'  'calling':4 'complete':2 'crow':3 'record':5 'the':1
                                   'search_artist'  'herter':1 'herters':3 'inc':4 's':2
                                  'search_release'  
                                     'search_rest'  '00spent':1 'electronic':5 'experimental':6 'herter':3 'mi':8,10 'oddness':7,9 's':4 'whistling':2
                                    'search_combo'  '00spent':10 'calling':4A 'complete':2A 'crow':3A 'electronic':14 'experimental':15 'herter':6B,12 'herters':8B 'inc':9B 'mi':17,19 'oddness':16,18 'record':5A 's':7B,13 'the':1A 'whistling':11
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528005.4648879  (2021-05-09 04:40:05)
                             'size'  667648