======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '159'
                                          'artist'  'Eddie Carroll'
                                     'text_people'  ''
                                         'release'  'Parlophone F 1307'
                                           'title'  'All Ashore (vocal - Gwen Jones)'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', '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'  "['twist', 'easy listening']"
                                     'discogstags'  "['pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1938'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '139.754'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Parlophone F 1307'
'TBPM' (BPM (beats per minute))                     '139.754'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1938'
'TIT2' (Title/songname/content description)         'All Ashore (vocal - Gwen Jones)'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Eddie Carroll'
'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'                                  'pop'
'TXXX:lastfmtags'                                   ['twist', 'easy listening']
'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-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.76 dB'
'TXXX:replaygain_track_peak'                        '0.650257'

========================== row from database ==========================
                                              'id'  1432861
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1938/Eddie Carroll - All Ashore (vocal - Gwen Jones) 8-12-1938.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  159
                                           'genre'  prerock-swing
                                        'filesize'  3188440
                                           'mtime'  1620561259
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1938 8 12 1938 prerock swing
                                      'tag_artist'  Eddie Carroll
                                     'tag_release'  Parlophone F 1307
                                       'tag_title'  All Ashore (vocal - Gwen Jones)
                                             'bpm'  139.754
                                    'search_title'  'all':1 'ashore':2 'gwen':5 'jones':6,7 'vocal':3,4
                                   'search_artist'  'carroll':2 'eddie':1
                                  'search_release'  '1307':3 'f':2 'parlophone':1
                                     'search_rest'  '00oldiepop':5 '1938':6 '8':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8 'swing':9
                                    'search_combo'  '00oldiepop':17 '1307':12C '1938':18 '8':19 'all':1A 'ashore':2A 'carroll':9B 'country':16 'eddie':8B 'exotica':14 'f':11C 'gwen':5A 'jazz':13 'jones':6A,7A 'oldies':15 'parlophone':10C 'prerock':20 'swing':21 'vocal':3A,4A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9B
                                           '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-1', 'q-grit-1']
                                      'lastfmtags'  ['twist', 'easy listening']
                                        'tag_date'  1938
                                     'discogstags'  ['pop']

============================== file details ==============================
                                           'mtime'  1620561259.400673  (2021-05-09 13:54:19)
                             'size'  3188440