======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '161'
                                          'artist'  'Rudi Schuricke'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Am Abend Auf Der Heide (Reginella Campagnola) (Schuricke Terzett)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-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-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['german', 'deutsche schlager', 'edhits', 'schlager']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1940'
                                        'comments'  ''
                                           'genre'  'prerock-german'
                                             'bpm'  '103.272'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '103.272'
'TCON' (Content type, a.k.a. Genre)                 'prerock-german'
'TDRC' (Recording time)                             '1940'
'TIT2' (Title/songname/content description)         'Am Abend Auf Der Heide (Reginella Campagnola) (Schuricke Terzett)'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Rudi Schuricke'
'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'                                   ['german', 'deutsche schlager', 'edhits', '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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+2.01 dB'
'TXXX:replaygain_track_peak'                        '0.469193'

========================== row from database ==========================
                                              'id'  1440189
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1940/Rudi Schuricke - Am Abend Auf Der Heide (Reginella Campagnola) (Terzett) 1940.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  161
                                           'genre'  prerock-german
                                        'filesize'  3235506
                                           'mtime'  1621627516
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1940 (Terzett) 1940 prerock german
                                      'tag_artist'  Rudi Schuricke
                                     'tag_release'  None
                                       'tag_title'  Am Abend Auf Der Heide (Reginella Campagnola) (Schuricke Terzett)
                                             'bpm'  103.272
                                    'search_title'  'abend':2 'am':1 'auf':3 'campagnola':8,9 'der':4 'heide':5 'reginella':6,7 'schuricke':10,11 'terzett':12,13
                                   'search_artist'  'rudi':1 'schuricke':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1940':6 'country':4 'exotica':2 'german':10 'jazz':1 'oldies':3 'prerock':9 'terzett':7,8
                                    'search_combo'  '00oldiepop':20 '1940':21 'abend':2A 'am':1A 'auf':3A 'campagnola':8A,9A 'country':19 'der':4A 'exotica':17 'german':25 'heide':5A 'jazz':16 'oldies':18 'prerock':24 'reginella':6A,7A 'rudi':14B 'schuricke':10A,11A,15B 'terzett':12A,13A,22,23
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['german', 'deutsche schlager', 'edhits', 'schlager']
                                        'tag_date'  1940
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627516.331313  (2021-05-21 22:05:16)
                             'size'  3235506