======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '232'
                                          'artist'  'Heinz Rühmann'
                                     'text_people'  ''
                                         'release'  'Kinderlieder [Collection]'
                                           'title'  'La - Le - Lu'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-OLDST-2', 'q-syn-1', "
 "'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-1', 'q-chart-2', 'q-drums-4', "
 "'q-other-2', 'q-piano-1', 'q-vocals-3', 'Q-HHRNBTT-1', 'q-mixbeat-1']")
                                      'lastfmtags'  "['deutsch', 'chanson', 'german', 'schlager', 'oldies']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'set-th-childrensmusic or educational'
                                             'bpm'  '108.9'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Kinderlieder [Collection]'
'TBPM' (BPM (beats per minute))                     '108.9'
'TCON' (Content type, a.k.a. Genre)                 'set-th-childrensmusic or educational'
'TIT2' (Title/songname/content description)         'La - Le - Lu'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Heinz Rühmann'
'TSOA' (Album sort order)                           '0'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['deutsch', 'chanson', 'german', 'schlager', 'oldies']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.23 dB'
'TXXX:replaygain_track_peak'                        '0.803486'

========================== row from database ==========================
                                              'id'  1316024
                                            'path'  /data/Music/Bulk/00spent/KINDERLIEDER/Heinz Ruehmann - La Le Lu.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  232
                                           'genre'  set-th-childrensmusic or educational
                                        'filesize'  3721098
                                           'mtime'  1676042885
                                   'redo_metaread'  0
                                        'rest_str'   00spent KINDERLIEDER Ruehmann set th childrensmusic or educational
                                      'tag_artist'  Heinz Rühmann
                                     'tag_release'  Kinderlieder [Collection]
                                       'tag_title'  La - Le - Lu
                                             'bpm'  108.9
                                    'search_title'  'la':1 'le':2 'lu':3
                                   'search_artist'  'heinz':1 'ruhmann':2,3
                                  'search_release'  'collection':2,3 'kinderlieder':1
                                     'search_rest'  '00spent':1 'childrensmusic':6 'educational':8 'kinderlieder':2 'or':7 'ruehmann':3 'set':4 'th':5
                                    'search_combo'  '00spent':10 'childrensmusic':15 'collection':8C,9C 'educational':17 'heinz':4B 'kinderlieder':7C,11 'la':1A 'le':2A 'lu':3A 'or':16 'ruehmann':12 'ruhmann':5B,6B 'set':13 'th':14
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-OLDST-2', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-1', 'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', 'Q-HHRNBTT-1', 'q-mixbeat-1']
                                      'lastfmtags'  ['deutsch', 'chanson', 'german', 'schlager', 'oldies']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1676042885.1758938  (2023-02-10 16:28:05)
                             'size'  3721098