======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '203'
                                          'artist'  'Billy Murray'
                                     'text_people'  ''
                                         'release'  'Victor-19628'
                                           'title'  'O Katharina (1925)'
                                           '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-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['all', 'really really oldies', 'music hall', 'vaudeville', 'real oldies', "
 "'gramophone']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1925'
                                        'comments'  ''
                                           'genre'  'prerock-vaudeville'
                                             'bpm'  '116.722'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Victor-19628'
'TBPM' (BPM (beats per minute))                     '116.722'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vaudeville'
'TDRC' (Recording time)                             '1925'
'TIT2' (Title/songname/content description)         'O Katharina (1925)'
'TKEY' (Initial key)                                '1A'
'TLEN' (Length)                                     '203521'
'TPE1' (Lead performer(s)/Soloist(s))               'Billy Murray'
'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'                                   ['all',
 'really really oldies',
 'music hall',
 'vaudeville',
 'real oldies',
 'gramophone']
'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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.65 dB'
'TXXX:replaygain_track_peak'                        '0.508043'

========================== row from database ==========================
                                              'id'  1135260
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Billy Murray - O Katharina 1925 Victor-19628.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  203
                                           'genre'  prerock-vaudeville
                                        'filesize'  3266560
                                           'mtime'  1620666348
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s and 1930s popular prerock vaudeville
                                      'tag_artist'  Billy Murray
                                     'tag_release'  Victor-19628
                                       'tag_title'  O Katharina (1925)
                                             'bpm'  116.722
                                    'search_title'  '1925':3,4 'katharina':2 'o':1
                                   'search_artist'  'billy':1 'murray':2
                                  'search_release'  '19628':2 'victor':1 'victor19628':3
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':8 'and':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'popular':9 'prerock':10 'vaudeville':11
                                    'search_combo'  '00oldiepop':14 '1920s':15 '1925':3A,4A '1930s':17 '19628':8C 'and':16 'billy':5B 'country':13 'exotica':11 'jazz':10 'katharina':2A 'murray':6B 'o':1A 'oldies':12 'popular':18 'prerock':19 'vaudeville':20 'victor':7C 'victor19628':9C
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  1A
                                           '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-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['all', 'really really oldies', 'music hall', 'vaudeville', 'real oldies', 'gramophone']
                                        'tag_date'  1925
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620666347.668967  (2021-05-10 19:05:47)
                             'size'  3266560