======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '153'
                                          'artist'  'Ella Fitzgerald'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'That Old Black Magic'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-1', 'q-play-3', "
 "'q-chart-1', 'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '14'
                                      'tracktotal'  ''
                                            'date'  '1953'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '144.541'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '144.541'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1953'
'TIT2' (Title/songname/content description)         'That Old Black Magic'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Ella Fitzgerald'
'TRCK' (Track number/Position in set)               '14'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+3.29 dB'
'TXXX:replaygain_track_peak'                        '0.404366'

========================== row from database ==========================
                                              'id'  1454748
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1953/Ella Fitzgerald - That Old Black Magic 1953.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  153
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  2450967
                                           'mtime'  1620527663
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1953 1953 prerock jb jazz unsorted
                                      'tag_artist'  Ella Fitzgerald
                                     'tag_release'  None
                                       'tag_title'  That Old Black Magic
                                             'bpm'  144.541
                                    'search_title'  'black':3 'magic':4 'old':2 'that':1
                                   'search_artist'  'ella':1 'fitzgerald':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1953':6 'country':4 'exotica':2 'jazz':1 'jb':8 'oldies':3 'prerock':7 'unsorted':9
                                    'search_combo'  '00oldiepop':11 '1953':12 'black':3A 'country':10 'ella':5B 'exotica':8 'fitzgerald':6B 'jazz':7 'jb':14 'magic':4A 'old':2A 'oldies':9 'prerock':13 'that':1A 'unsorted':15
                                    'tag_tracknum'  14
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']
                                        'tag_date'  1953
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620527662.6511357  (2021-05-09 04:34:22)
                             'size'  2450967