======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '185'
                                          'artist'  'Ilse Werner'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Sing Ein Lied Wenn Du Mal Traurig Bist'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-LOCALNESS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['german', 'female vocalists', 'oldies', 'myschlager']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1941'
                                        'comments'  ''
                                           'genre'  'prerock-vocal;loc-eur-germany'
                                             'bpm'  '103.483'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '103.483'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-vocal', 'loc-eur-germany']
'TDRC' (Recording time)                             '1941'
'TIT2' (Title/songname/content description)         'Sing Ein Lied Wenn Du Mal Traurig Bist'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Ilse Werner'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['german', 'female vocalists', 'oldies', 'myschlager']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'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'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.82 dB'
'TXXX:replaygain_track_peak'                        '0.279979'

========================== row from database ==========================
                                              'id'  1430468
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1941/Ilse Werner - Sing Ein Lied Wenn Du Mal Traurig Bist 1941.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  185
                                           'genre'  prerock-vocal;loc-eur-germany
                                        'filesize'  3720871
                                           'mtime'  1621627527
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1941 1941 prerock vocal;loc eur germany
                                      'tag_artist'  Ilse Werner
                                     'tag_release'  None
                                       'tag_title'  Sing Ein Lied Wenn Du Mal Traurig Bist
                                             'bpm'  103.483
                                    'search_title'  'bist':8 'du':5 'ein':2 'lied':3 'mal':6 'sing':1 'traurig':7 'wenn':4
                                   'search_artist'  'ilse':1 'werner':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1941':6 'country':4 'eur':12 'exotica':2 'germany':13 'jazz':1 'loc':9,11 'oldies':3 'prerock':7 'vocal':8,10
                                    'search_combo'  '00oldiepop':15 '1941':16 'bist':8A 'country':14 'du':5A 'ein':2A 'eur':22 'exotica':12 'germany':23 'ilse':9B 'jazz':11 'lied':3A 'loc':19,21 'mal':6A 'oldies':13 'prerock':17 'sing':1A 'traurig':7A 'vocal':18,20 'wenn':4A 'werner':10B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['german', 'female vocalists', 'oldies', 'myschlager']
                                        'tag_date'  1941
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627527.2673736  (2021-05-21 22:05:27)
                             'size'  3720871