======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '167'
                                          'artist'  'Jay Wilbur'
                                     'text_people'  ''
                                         'release'  'Rex  9220'
                                           'title'  'With Mary Tattooed On His Arm (vocal - Rhythm Brothers)'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-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-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['united kingdom', 'spotify', 'all', 'uk']"
                                     'discogstags'  "['jazz', 'pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1937'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '84.420'
                                             'key'  '5B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Rex  9220'
'TBPM' (BPM (beats per minute))                     '84.420'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1937'
'TIT2' (Title/songname/content description)         'With Mary Tattooed On His Arm (vocal - Rhythm Brothers)'
'TKEY' (Initial key)                                '5B'
'TPE1' (Lead performer(s)/Soloist(s))               'Jay Wilbur'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['jazz', 'pop']
'TXXX:lastfmtags'                                   ['united kingdom', 'spotify', 'all', 'uk']
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.95 dB'
'TXXX:replaygain_track_peak'                        '0.462682'

========================== row from database ==========================
                                              'id'  1430889
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1937/Jay Wilbur - With Mary Tattooed On His Arm (vocal - Rhythm Brothers) 28-12-1937.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  167
                                           'genre'  prerock-swing
                                        'filesize'  3350323
                                           'mtime'  1620561115
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1937 28 12 1937 prerock swing
                                      'tag_artist'  Jay Wilbur
                                     'tag_release'  Rex  9220
                                       'tag_title'  With Mary Tattooed On His Arm (vocal - Rhythm Brothers)
                                             'bpm'  84.42
                                    'search_title'  'arm':6 'brothers':10,11 'his':5 'mary':2 'on':4 'rhythm':9 'tattooed':3 'vocal':7,8 'with':1
                                   'search_artist'  'jay':1 'wilbur':2
                                  'search_release'  '9220':2 'rex':1
                                     'search_rest'  '00oldiepop':5 '1937':6 '28':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8 'swing':9
                                    'search_combo'  '00oldiepop':20 '1937':21 '28':22 '9220':15C 'arm':6A 'brothers':10A,11A 'country':19 'exotica':17 'his':5A 'jay':12B 'jazz':16 'mary':2A 'oldies':18 'on':4A 'prerock':23 'rex':14C 'rhythm':9A 'swing':24 'tattooed':3A 'vocal':7A,8A 'wilbur':13B 'with':1A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  5B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', '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-4', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['united kingdom', 'spotify', 'all', 'uk']
                                        'tag_date'  1937
                                     'discogstags'  ['jazz', 'pop']

============================== file details ==============================
                                           'mtime'  1620561114.7567785  (2021-05-09 13:51:54)
                             'size'  3350323