======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '195'
                                          'artist'  'Billy Vaughn & His Orchestra'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "A Theme From (The Three Penny Opera) 'Moritat'"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-vocals-2', 'q-mixbeat-1', "
 "'Q-PIANO-3']")
                                      'lastfmtags'  "['instrumental', 'swing', 'oldies', 'myhits', 'easy listening']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '226'
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '105.258'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '105.258'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         "A Theme From (The Three Penny Opera) 'Moritat'"
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Billy Vaughn & His Orchestra'
'TRCK' (Track number/Position in set)               '226'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['instrumental', 'swing', 'oldies', 'myhits', 'easy listening']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+1.82 dB'
'TXXX:replaygain_track_peak'                        '0.695175'

========================== row from database ==========================
                                              'id'  1499263
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1956/1956-226 - Billy Vaughn & His Orchestra - A Theme From (The Three Penny Opera) _Moritat_.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  195
                                           'genre'  prerock-swing
                                        'filesize'  7806976
                                           'mtime'  1620562573
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1956 1956 226 _Moritat_ prerock swing
                                      'tag_artist'  Billy Vaughn & His Orchestra
                                     'tag_release'  None
                                       'tag_title'  A Theme From (The Three Penny Opera) 'Moritat'
                                             'bpm'  105.258
                                    'search_title'  'a':1 'from':3 'moritat':10,11 'opera':8,9 'penny':7 'the':4,5 'theme':2 'three':6
                                   'search_artist'  'billy':1 'his':3 'orchestra':4 'vaughn':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1956':6 '226':7 'country':4 'exotica':2 'jazz':1 'moritat':8 'oldies':3 'prerock':9 'swing':10
                                    'search_combo'  '00oldiepop':20 '1956':21 '226':22 'a':1A 'billy':12B 'country':19 'exotica':17 'from':3A 'his':14B 'jazz':16 'moritat':10A,11A,23 'oldies':18 'opera':8A,9A 'orchestra':15B 'penny':7A 'prerock':24 'swing':25 'the':4A,5A 'theme':2A 'three':6A 'vaughn':13B
                                    'tag_tracknum'  226
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-3', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['instrumental', 'swing', 'oldies', 'myhits', 'easy listening']
                                        'tag_date'  1956
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562572.8328488  (2021-05-09 14:16:12)
                             'size'  7806976