======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '230'
                                          'artist'  'Louis Armstrong'
                                     'text_people'  ''
                                         'release'  'Philips B 21776 H'
                                           'title'  "Back O' Town Blues"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'Q-PLAY-2', 'q-syn-1', 'q-bass-2', 'q-busy-2', 'q-grit-2', "
 "'Q-PIANO-2', 'q-chart-3', 'q-drums-1', 'q-other-3', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues', 'jazz', 'trumpet', 'oldies', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1955'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '141.413'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Philips B 21776 H'
'TBPM' (BPM (beats per minute))                     '141.413'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1955'
'TIT2' (Title/songname/content description)         "Back O' Town Blues"
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Louis Armstrong'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['blues', 'jazz', 'trumpet', 'oldies', 'swing']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.28 dB'
'TXXX:replaygain_track_peak'                        '0.518256'

========================== row from database ==========================
                                              'id'  1508966
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1955/Louis Armstrong - Back O_ Town Blues 28-9-1955.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  230
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  4609706
                                           'mtime'  1620527723
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1955 O_ 28 9 1955 prerock jb jazz unsorted
                                      'tag_artist'  Louis Armstrong
                                     'tag_release'  Philips B 21776 H
                                       'tag_title'  Back O' Town Blues
                                             'bpm'  141.413
                                    'search_title'  'back':1 'blues':5 'o':2,3 'town':4
                                   'search_artist'  'armstrong':2 'louis':1
                                  'search_release'  '21776':3 'b':2 'h':4 'philips':1
                                     'search_rest'  '00oldiepop':5 '1955':6 '28':8 '9':9 'country':4 'exotica':2 'jazz':1 'jb':11 'o':7 'oldies':3 'prerock':10 'unsorted':12
                                    'search_combo'  '00oldiepop':16 '1955':17 '21776':10C '28':19 '9':20 'armstrong':7B 'b':9C 'back':1A 'blues':5A 'country':15 'exotica':13 'h':11C 'jazz':12 'jb':22 'louis':6B 'o':2A,3A,18 'oldies':14 'philips':8C 'prerock':21 'town':4A 'unsorted':23
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'jazz', 'trumpet', 'oldies', 'swing']
                                        'tag_date'  1955
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620527722.7167704  (2021-05-09 04:35:22)
                             'size'  4609706