======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '189'
                                          'artist'  'J Deutsch & Rosa Finkelstein'
                                     'text_people'  ''
                                         'release'  'Beka Grand 10934'
                                           'title'  "Der Schwur (aus Der Oper ' Sulamith')"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1907'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '144.852'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Beka Grand 10934'
'TBPM' (BPM (beats per minute))                     '144.852'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1907'
'TIT2' (Title/songname/content description)         "Der Schwur (aus Der Oper ' Sulamith')"
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'J Deutsch & Rosa Finkelstein'
'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:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'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'                        '+0.72 dB'
'TXXX:replaygain_track_peak'                        '0.397279'

========================== row from database ==========================
                                              'id'  1517136
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1907/J Deutsch & Rosa Finkelstein - Der Schwur (aus der Oper _ Sulamith_) 1907.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  189
                                           'genre'  prerock-unsorted
                                        'filesize'  3786546
                                           'mtime'  1621697683
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1907 der _ Sulamith_) 1907 prerock unsorted
                                      'tag_artist'  J Deutsch & Rosa Finkelstein
                                     'tag_release'  Beka Grand 10934
                                       'tag_title'  Der Schwur (aus Der Oper ' Sulamith')
                                             'bpm'  144.852
                                    'search_title'  'aus':3,4 'der':1 'oper':5 'schwur':2 'sulamith':6,7
                                   'search_artist'  'deutsch':2 'finkelstein':4 'j':1 'rosa':3
                                  'search_release'  '10934':3 'beka':1 'grand':2
                                     'search_rest'  '00oldiepop':5 '1907':6 'country':4 'der':7 'exotica':2 'jazz':1 'oldies':3 'prerock':10 'sulamith':8,9 'unsorted':11
                                    'search_combo'  '00oldiepop':19 '10934':14C '1907':20 'aus':3A,4A 'beka':12C 'country':18 'der':1A,21 'deutsch':9B 'exotica':16 'finkelstein':11B 'grand':13C 'j':8B 'jazz':15 'oldies':17 'oper':5A 'prerock':24 'rosa':10B 'schwur':2A 'sulamith':6A,7A,22,23 'unsorted':25
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           '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-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1907
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621697682.6138706  (2021-05-22 17:34:42)
                             'size'  3786546