======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '167'
                                          'artist'  'Rudi Schuricke'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "So Verliebt Wie Heut' War Ich Nie"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['german', 'deutsche schlager', 'edhits', 'schlager']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1939'
                                        'comments'  ''
                                           'genre'  'prerock-german'
                                             'bpm'  '145.685'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '145.685'
'TCON' (Content type, a.k.a. Genre)                 'prerock-german'
'TDRC' (Recording time)                             '1939'
'TIT2' (Title/songname/content description)         "So Verliebt Wie Heut' War Ich Nie"
'TKEY' (Initial key)                                '3A'
'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'                                       '1'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.23 dB'
'TXXX:replaygain_track_peak'                        '0.668893'

========================== row from database ==========================
                                              'id'  1502994
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1939/Rudi Schuricke - So Verliebt Wie Heut_ War Ich Nie 1939.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  167
                                           'genre'  prerock-german
                                        'filesize'  3360611
                                           'mtime'  1621627474
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1939 Heut_ 1939 prerock german
                                      'tag_artist'  Rudi Schuricke
                                     'tag_release'  None
                                       'tag_title'  So Verliebt Wie Heut' War Ich Nie
                                             'bpm'  145.685
                                    'search_title'  'heut':4,5 'ich':7 'nie':8 'so':1 'verliebt':2 'war':6 'wie':3
                                   'search_artist'  'rudi':1 'schuricke':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1939':6 'country':4 'exotica':2 'german':9 'heut':7 'jazz':1 'oldies':3 'prerock':8
                                    'search_combo'  '00oldiepop':15 '1939':16 'country':14 'exotica':12 'german':19 'heut':4A,5A,17 'ich':7A 'jazz':11 'nie':8A 'oldies':13 'prerock':18 'rudi':9B 'schuricke':10B 'so':1A 'verliebt':2A 'war':6A 'wie':3A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-1', 'q-grit-2']
                                      'lastfmtags'  ['german', 'deutsche schlager', 'edhits', 'schlager']
                                        'tag_date'  1939
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627473.691714  (2021-05-21 22:04:33)
                             'size'  3360611