======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '180'
                                          'artist'  'Five Red Caps'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "233 I learned a lesson I'll never forget - Five Red Caps (15-04-1944)"
                                           'quals'  ("['Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', "
 "'q-grit-1', 'q-play-2', 'Q-OLDST-1', 'q-chart-2', 'q-drums-1', 'q-other-2', "
 "'q-piano-1', 'q-vocals-4', 'Q-HHRNBTT-1', 'q-mixbeat-1']")
                                      'lastfmtags'  "['oldies', '40s', 'swing', 'jump blues', 'vocal groups']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '233'
                                      'tracktotal'  ''
                                            'date'  '1944'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '142.508'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '142.508'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1944'
'TIT2' (Title/songname/content description)         "233 I learned a lesson I'll never forget - Five Red Caps (15-04-1944)"
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Five Red Caps'
'TRCK' (Track number/Position in set)               '233'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['oldies', '40s', 'swing', 'jump blues', 'vocal groups']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.85 dB'
'TXXX:replaygain_track_peak'                        '0.300622'

========================== row from database ==========================
                                              'id'  1510214
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1943/233 I learned a lesson I_ll never forget - Five Red Caps (15-04-1944).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  180
                                           'genre'  prerock-unsorted
                                        'filesize'  2899406
                                           'mtime'  1620386964
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1943 I_ll prerock unsorted
                                      'tag_artist'  Five Red Caps
                                     'tag_release'  None
                                       'tag_title'  233 I learned a lesson I'll never forget - Five Red Caps (15-04-1944)
                                             'bpm'  142.508
                                    'search_title'  '04':15 '15':14 '15041944':17 '1944':16 '233':1 'a':4 'caps':13 'five':11 'forget':10 'i':2,6 'ill':8 'learned':3 'lesson':5 'll':7 'never':9 'red':12
                                   'search_artist'  'caps':3 'five':1 'red':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1943':6 'country':4 'exotica':2 'i':7 'jazz':1 'll':8 'oldies':3 'prerock':9 'unsorted':10
                                    'search_combo'  '00oldiepop':25 '04':15A '15':14A '15041944':17A '1943':26 '1944':16A '233':1A 'a':4A 'caps':13A,20B 'country':24 'exotica':22 'five':11A,18B 'forget':10A 'i':2A,6A,27 'ill':8A 'jazz':21 'learned':3A 'lesson':5A 'll':7A,28 'never':9A 'oldies':23 'prerock':29 'red':12A,19B 'unsorted':30
                                    'tag_tracknum'  233
                                      'num_images'  0
                                             'key'  9A
                                           '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-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-2', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['oldies', '40s', 'swing', 'jump blues', 'vocal groups']
                                        'tag_date'  1944
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620386964.165086  (2021-05-07 13:29:24)
                             'size'  2899406