======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '174'
                                          'artist'  'Bert Ambrose'
                                     'text_people'  ''
                                         'release'  'Decca F 5742'
                                           'title'  "General's Fast Asleep (vocal - Evelyn Dall & 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-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  '["20\'s", \'british dance band\', \'retro\', \'swing\']'
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '93.457'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Decca F 5742'
'TBPM' (BPM (beats per minute))                     '93.457'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         "General's Fast Asleep (vocal - Evelyn Dall & Rhythm Brothers)"
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Bert Ambrose'
'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'
'TXXX:lastfmtags'                                   ["20's", 'british dance band', 'retro', 'swing']
'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-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.24 dB'
'TXXX:replaygain_track_peak'                        '0.786102'

========================== row from database ==========================
                                              'id'  1500658
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1935/Bert Ambrose - General_s Fast Asleep (vocal - Evelyn Dall & Rhythm Brothers) 12-10-1935.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  174
                                           'genre'  prerock-swing
                                        'filesize'  3481394
                                           'mtime'  1620560636
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1935 General_s 12 10 1935 prerock swing
                                      'tag_artist'  Bert Ambrose
                                     'tag_release'  Decca F 5742
                                       'tag_title'  General's Fast Asleep (vocal - Evelyn Dall & Rhythm Brothers)
                                             'bpm'  93.457
                                    'search_title'  'asleep':5 'brothers':11,12 'dall':9 'evelyn':8 'fast':4 'general':1 'generals':3 'rhythm':10 's':2 'vocal':6,7
                                   'search_artist'  'ambrose':2 'bert':1
                                  'search_release'  '5742':3 'decca':1 'f':2
                                     'search_rest'  '00oldiepop':5 '1935':6 'country':4 'exotica':2 'general':7 'jazz':1 'oldies':3 'prerock':9 's':8 'swing':10
                                    'search_combo'  '00oldiepop':22 '1935':23 '5742':17C 'ambrose':14B 'asleep':5A 'bert':13B 'brothers':11A,12A 'country':21 'dall':9A 'decca':15C 'evelyn':8A 'exotica':19 'f':16C 'fast':4A 'general':1A,24 'generals':3A 'jazz':18 'oldies':20 'prerock':26 'rhythm':10A 's':2A,25 'swing':27 'vocal':6A,7A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           '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-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ["20's", 'british dance band', 'retro', 'swing']
                                        'tag_date'  1935
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620560635.8737977  (2021-05-09 13:43:55)
                             'size'  3481394