======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '203'
                                          'artist'  'Marie Rappold'
                                     'text_people'  ''
                                         'release'  'Edison Blue Amberol 28242'
                                           'title'  "Wenn Die Schwalben Heimwärts Zieh'n (+ Jacques Urlus)"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', '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-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['grammophon']"
                                     'discogstags'  "['opera', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1916'
                                        'comments'  ''
                                           'genre'  'prerock-vocal-opera'
                                             'bpm'  '145.5'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'TALB' (Album/Movie/Show title)                     'Edison Blue Amberol 28242'
'TBPM' (BPM (beats per minute))                     '145.5'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal-opera'
'TDRC' (Recording time)                             '1916'
'TIT2' (Title/songname/content description)         "Wenn Die Schwalben Heimwärts Zieh'n (+ Jacques Urlus)"
'TKEY' (Initial key)                                '4A'
'TLEN' (Length)                                     '203000'
'TPE1' (Lead performer(s)/Soloist(s))               'Marie Rappold'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['opera', 'classical']
'TXXX:lastfmtags'                                   'grammophon'
'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'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.04 dB'
'TXXX:replaygain_track_peak'                        '0.449820'

========================== row from database ==========================
                                              'id'  1519157
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1916/Marie Rappold - Wenn Die Schwalben Heimwärts Zieh_n (+ Jacques Urlus) 1916.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  203
                                           'genre'  prerock-vocal-opera
                                        'filesize'  4123859
                                           'mtime'  1621625671
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1916 Zieh_n 1916 prerock vocal opera
                                      'tag_artist'  Marie Rappold
                                     'tag_release'  Edison Blue Amberol 28242
                                       'tag_title'  Wenn Die Schwalben Heimwärts Zieh'n (+ Jacques Urlus)
                                             'bpm'  145.5
                                    'search_title'  'die':2 'heimwarts':4,5 'jacques':9 'n':7 'schwalben':3 'urlus':10,11 'wenn':1 'zieh':6 'ziehn':8
                                   'search_artist'  'marie':1 'rappold':2
                                  'search_release'  '28242':4 'amberol':3 'blue':2 'edison':1
                                     'search_rest'  '00oldiepop':5 '1916':6 'country':4 'exotica':2 'jazz':1 'n':8 'oldies':3 'opera':11 'prerock':9 'vocal':10 'zieh':7
                                    'search_combo'  '00oldiepop':22 '1916':23 '28242':17C 'amberol':16C 'blue':15C 'country':21 'die':2A 'edison':14C 'exotica':19 'heimwarts':4A,5A 'jacques':9A 'jazz':18 'marie':12B 'n':7A,25 'oldies':20 'opera':28 'prerock':26 'rappold':13B 'schwalben':3A 'urlus':10A,11A 'vocal':27 'wenn':1A 'zieh':6A,24 'ziehn':8A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', '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-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['grammophon']
                                        'tag_date'  1916
                                     'discogstags'  ['opera', 'classical']

============================== file details ==============================
                                           'mtime'  1621625671.2245834  (2021-05-21 21:34:31)
                             'size'  4123859