======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '212'
                                          'artist'  'Pia Beck'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "John's Guitar Boogie"
                                           'quals'  ("['Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-1', 'q-play-2', 'Q-PIANO-3', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-vocals-1', 'q-mixbeat-1']")
                                      'lastfmtags'  "['netherlands', 'female vocalist', 'jazz', 'piano', 'dutch']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1952'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '140.044'
                                             'key'  '12A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '140.044'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1952'
'TIT2' (Title/songname/content description)         "John's Guitar Boogie"
'TKEY' (Initial key)                                '12A'
'TPE1' (Lead performer(s)/Soloist(s))               'Pia Beck'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['netherlands', 'female vocalist', 'jazz', 'piano', 'dutch']
'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-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.15 dB'
'TXXX:replaygain_track_peak'                        '0.665502'

========================== row from database ==========================
                                              'id'  1500044
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1952/Pia Beck - John_s Guitar Boogie 28-2-1952.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  212
                                           'genre'  prerock-unsorted
                                        'filesize'  4246469
                                           'mtime'  1620387372
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1952 John_s 28 2 1952 prerock unsorted
                                      'tag_artist'  Pia Beck
                                     'tag_release'  None
                                       'tag_title'  John's Guitar Boogie
                                             'bpm'  140.044
                                    'search_title'  'boogie':5 'guitar':4 'john':1 'johns':3 's':2
                                   'search_artist'  'beck':2 'pia':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1952':6 '2':10 '28':9 'country':4 'exotica':2 'jazz':1 'john':7 'oldies':3 'prerock':11 's':8 'unsorted':12
                                    'search_combo'  '00oldiepop':12 '1952':13 '2':17 '28':16 'beck':7B 'boogie':5A 'country':11 'exotica':9 'guitar':4A 'jazz':8 'john':1A,14 'johns':3A 'oldies':10 'pia':6B 'prerock':18 's':2A,15 'unsorted':19
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  12A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-3', '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-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['netherlands', 'female vocalist', 'jazz', 'piano', 'dutch']
                                        'tag_date'  1952
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620387372.4631712  (2021-05-07 13:36:12)
                             'size'  4246469