======================== unified (from filesystem) ========================
                                         'bitrate'  '32.0'
                                        'duration'  '148'
                                          'artist'  'Edward Avis'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Bird Calls - An Evening in Birdland'
                                           '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-1', 'q-piano-1', 'q-vocals-4', "
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                                     'discogstags'  "['non-music']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-experimental-oddness;mi-whistling'
                                             'bpm'  '136.0'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '136.0'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-experimental-oddness', 'mi-whistling']
'TENC' (Encoded by)                                 'Basic Hip Digital Oddio'
'TIT2' (Title/songname/content description)         'Bird Calls - An Evening in Birdland'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'Edward Avis'
'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:discogstags'                                  'non-music'
'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-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+3.94 dB'
'TXXX:replaygain_track_peak'                        '0.693976'
'WXXX:'                                             WXXX(encoding=<Encoding.LATIN1: 0>, desc='', url='http://www.whistlingrecords.com')

========================== row from database ==========================
                                              'id'  1299420
                                            'path'  /data/Music/Bulk/00spent/Whistling/21 - Edward Avis - An evening in birdland.mp3
                                         'working'  None
                                         'bitrate'  32
                                    'duration_sec'  148
                                           'genre'  electronic-experimental-oddness;mi-whistling
                                        'filesize'  595968
                                           'mtime'  1620527951
                                   'redo_metaread'  0
                                        'rest_str'   00spent Whistling 21 evening birdland electronic experimental oddness;mi whistling
                                      'tag_artist'  Edward Avis
                                     'tag_release'  None
                                       'tag_title'  Bird Calls - An Evening in Birdland
                                             'bpm'  136.0
                                    'search_title'  'an':3 'bird':1 'birdland':6 'calls':2 'evening':4 'in':5
                                   'search_artist'  'avis':2 'edward':1
                                  'search_release'  
                                     'search_rest'  '00spent':1 '21':3 'birdland':5 'electronic':6 'evening':4 'experimental':7 'mi':9,11 'oddness':8,10 'whistling':2
                                    'search_combo'  '00spent':9 '21':11 'an':3A 'avis':8B 'bird':1A 'birdland':6A,13 'calls':2A 'edward':7B 'electronic':14 'evening':4A,12 'experimental':15 'in':5A 'mi':17,19 'oddness':16,18 'whistling':10
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1B
                                           '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-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  ['non-music']

============================== file details ==============================
                                           'mtime'  1620527950.8236597  (2021-05-09 04:39:10)
                             'size'  595968