======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '184'
                                          'artist'  'Caterina Valente'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Wie Wär's"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['myhitparade', 'jazz', 'female vocalists', 'deutsche schlager', 'schlager']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'prerock-german'
                                             'bpm'  '120.042'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '120.042'
'TCON' (Content type, a.k.a. Genre)                 'prerock-german'
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         "Wie Wär's"
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Caterina Valente'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['myhitparade', 'jazz', 'female vocalists', 'deutsche schlager', 'schlager']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'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'                        '+1.11 dB'
'TXXX:replaygain_track_peak'                        '0.446599'

========================== row from database ==========================
                                              'id'  1505611
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1956/Caterina Valente - Wie Wär_s 28-4-1956.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  184
                                           'genre'  prerock-german
                                        'filesize'  3696434
                                           'mtime'  1621627894
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1956 Wär_s 28 4 1956 prerock german
                                      'tag_artist'  Caterina Valente
                                     'tag_release'  None
                                       'tag_title'  Wie Wär's
                                             'bpm'  120.042
                                    'search_title'  's':3,6 'war':2,5 'wars':4,7 'wie':1
                                   'search_artist'  'caterina':1 'valente':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1956':6 '28':11 '4':12 'country':4 'exotica':2 'german':14 'jazz':1 'oldies':3 'prerock':13 's':8,10 'war':7,9
                                    'search_combo'  '00oldiepop':14 '1956':15 '28':20 '4':21 'caterina':8B 'country':13 'exotica':11 'german':23 'jazz':10 'oldies':12 'prerock':22 's':3A,6A,17,19 'valente':9B 'war':2A,5A,16,18 'wars':4A,7A 'wie':1A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['myhitparade', 'jazz', 'female vocalists', 'deutsche schlager', 'schlager']
                                        'tag_date'  1956
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627893.9776006  (2021-05-21 22:11:33)
                             'size'  3696434