======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '144'
                                          'artist'  'Andy Williams'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Butterfly'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['oldies', '60s', 'male vocalists', 'pop', 'easy listening', 'christmas']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '21'
                                      'tracktotal'  ''
                                            'date'  '1957'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '127.0'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '127.0'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1957'
'TIT2' (Title/songname/content description)         'Butterfly'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Andy Williams'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '21'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['oldies', '60s', 'male vocalists', 'pop', 'easy listening', 'christmas']
'TXXX:q-bass'                                       '4'
'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'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.94 dB'
'TXXX:replaygain_track_peak'                        '0.605413'

========================== row from database ==========================
                                              'id'  1119962
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Time Life - Your Hit Parade- 1957/21. Andy Williams - Butterfly.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  144
                                           'genre'  prerock-unsorted
                                        'filesize'  5784610
                                           'mtime'  1621697518
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Time Life Your Hit Parade 1957 21. prerock unsorted
                                      'tag_artist'  Andy Williams
                                     'tag_release'  None
                                       'tag_title'  Butterfly
                                             'bpm'  127.0
                                    'search_title'  'butterfly':1
                                   'search_artist'  'andy':1 'williams':2
                                  'search_release'  
                                     'search_rest'  '1957':6 '21':7,8 'hit':4 'life':2 'parade':5 'prerock':9 'time':1 'unsorted':10 'your':3
                                    'search_combo'  '1957':9 '21':10,11 'andy':2B 'butterfly':1A 'hit':7 'life':5 'parade':8 'prerock':12 'time':4 'unsorted':13 'williams':3B 'your':6
                                    'tag_tracknum'  21
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['oldies', '60s', 'male vocalists', 'pop', 'easy listening', 'christmas']
                                        'tag_date'  1957
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621697518.2763672  (2021-05-22 17:31:58)
                             'size'  5784610