======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '174'
                                          'artist'  'Cozy Cole'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Why Regret'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'Q-PLAY-2', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-vocals-3', 'q-mixbeat-1', "
 "'Q-PIANO-2']")
                                      'lastfmtags'  "['need to rate', 'jazz', 'illstreet', 'drums', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1945'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '90.411'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '90.411'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1945'
'TIT2' (Title/songname/content description)         'Why Regret'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Cozy Cole'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['need to rate', 'jazz', 'illstreet', 'drums', 'swing']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.85 dB'
'TXXX:replaygain_track_peak'                        '0.674217'

========================== row from database ==========================
                                              'id'  1438715
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1945/Cozy Cole - Why Regret 1945.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  174
                                           'genre'  prerock-swing
                                        'filesize'  3489586
                                           'mtime'  1620561967
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1945 1945 prerock swing
                                      'tag_artist'  Cozy Cole
                                     'tag_release'  None
                                       'tag_title'  Why Regret
                                             'bpm'  90.411
                                    'search_title'  'regret':2 'why':1
                                   'search_artist'  'cole':2 'cozy':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1945':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':7 'swing':8
                                    'search_combo'  '00oldiepop':9 '1945':10 'cole':4B 'country':8 'cozy':3B 'exotica':6 'jazz':5 'oldies':7 'prerock':11 'regret':2A 'swing':12 'why':1A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['need to rate', 'jazz', 'illstreet', 'drums', 'swing']
                                        'tag_date'  1945
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561966.5768518  (2021-05-09 14:06:06)
                             'size'  3489586