======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '23'
                                          'artist'  'Historical Recordings'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  ''
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1987'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '117.9'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '117.9'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1987'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Historical Recordings'
'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:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'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'                        '+2.09 dB'
'TXXX:replaygain_track_peak'                        '0.315613'

========================== row from database ==========================
                                              'id'  982358
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/veryearly/1887/1887 - twinkle, twinkle little star (1st gramophone rec).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  23
                                           'genre'  prerock-unsorted
                                        'filesize'  376658
                                           'mtime'  1621698461
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm veryearly 1887 1887 twinkle, twinkle little star (1st gramophone rec) prerock unsorted
                                      'tag_artist'  Historical Recordings
                                     'tag_release'  None
                                       'tag_title'  None
                                             'bpm'  117.9
                                    'search_title'  None
                                   'search_artist'  'historical':1 'recordings':2
                                  'search_release'  
                                     'search_rest'  '1887':2 '1st':7,8 'gramophone':9 'little':5 'prerock':12 'rec':10,11 'star':6 'twinkle':3,4 'unsorted':13 'veryearly':1
                                    'search_combo'  '1887':4 '1st':9,10 'gramophone':11 'historical':1B 'little':7 'prerock':14 'rec':12,13 'recordings':2B 'star':8 'twinkle':5,6 'unsorted':15 'veryearly':3
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-piano-1', 'q-syn-1', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1987
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698460.9317515  (2021-05-22 17:47:40)
                             'size'  376658