======================== unified (from filesystem) ========================
                                         'bitrate'  '112.0'
                                        'duration'  '178'
                                          'artist'  'Jack Pettis & His Pets'
                                     'text_people'  ''
                                         'release'  '20s and 30s popular'
                                           'title'  "A BAG O' BLUES (1928)"
                                           'quals'  ("['Q-JZFKS-3', 'Q-LOCALNESS-2', '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-4', 'q-piano-1', 'q-vocals-1', 'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', 'dixieland', 'swing', '30s']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1928'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '121.701'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '20s and 30s popular'
'TBPM' (BPM (beats per minute))                     '121.701'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1928'
'TIT2' (Title/songname/content description)         "A BAG O' BLUES (1928)"
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Jack Pettis & His Pets'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['jazz', 'dixieland', 'swing', '30s']
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.35 dB'
'TXXX:replaygain_track_peak'                        '0.593896'

========================== row from database ==========================
                                              'id'  1520888
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Jack Pettis & His Pets - A BAG O_ BLUES (1928).mp3
                                         'working'  None
                                         'bitrate'  112
                                    'duration_sec'  178
                                           'genre'  prerock-unsorted
                                        'filesize'  2517015
                                           'mtime'  1620385435
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s O_ prerock unsorted
                                      'tag_artist'  Jack Pettis & His Pets
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  A BAG O' BLUES (1928)
                                             'bpm'  121.701
                                    'search_title'  '1928':6,7 'a':1 'bag':2 'blues':5 'o':3,4
                                   'search_artist'  'his':3 'jack':1 'pets':4 'pettis':2
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':7 'country':4 'exotica':2 'jazz':1 'o':8 'oldies':3 'prerock':9 'unsorted':10
                                    'search_combo'  '00oldiepop':20 '1920s':21 '1928':6A,7A '1930s':22 '20s':12C '30s':14C 'a':1A 'and':13C 'bag':2A 'blues':5A 'country':19 'exotica':17 'his':10B 'jack':8B 'jazz':16 'o':3A,4A,23 'oldies':18 'pets':11B 'pettis':9B 'popular':15C 'prerock':24 'unsorted':25
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['jazz', 'dixieland', 'swing', '30s']
                                        'tag_date'  1928
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620385434.5780005  (2021-05-07 13:03:54)
                             'size'  2517015