======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '169'
                                          'artist'  'Bob Scholte'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Amsterdam Bij Nacht (+ Jetty Cantor)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['nederlandstalig', 'netherlands', 'nederlands', 'oldies', 'dutch']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1937'
                                        'comments'  ''
                                           'genre'  'prerock-vocal;loc-eur-netherlands'
                                             'bpm'  '134.0'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'TBPM' (BPM (beats per minute))                     '134.0'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-vocal', 'loc-eur-netherlands']
'TDRC' (Recording time)                             '1937-01-27'
'TIT2' (Title/songname/content description)         'Amsterdam Bij Nacht (+ Jetty Cantor)'
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '169000'
'TPE1' (Lead performer(s)/Soloist(s))               'Bob Scholte'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['nederlandstalig', 'netherlands', 'nederlands', 'oldies', 'dutch']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.88 dB'
'TXXX:replaygain_track_peak'                        '0.547393'

========================== row from database ==========================
                                              'id'  1463189
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1937/Bob Scholte - Amsterdam Bij Nacht (+ Jetty Cantor) 27-1-1937.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  169
                                           'genre'  prerock-vocal;loc-eur-netherlands
                                        'filesize'  3470869
                                           'mtime'  1621627310
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1937 27 1 1937 prerock vocal;loc eur netherlands
                                      'tag_artist'  Bob Scholte
                                     'tag_release'  None
                                       'tag_title'  Amsterdam Bij Nacht (+ Jetty Cantor)
                                             'bpm'  134.0
                                    'search_title'  'amsterdam':1 'bij':2 'cantor':5,6 'jetty':4 'nacht':3
                                   'search_artist'  'bob':1 'scholte':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1':8 '1937':6 '27':7 'country':4 'eur':14 'exotica':2 'jazz':1 'loc':11,13 'netherlands':15 'oldies':3 'prerock':9 'vocal':10,12
                                    'search_combo'  '00oldiepop':13 '1':16 '1937':14 '27':15 'amsterdam':1A 'bij':2A 'bob':7B 'cantor':5A,6A 'country':12 'eur':22 'exotica':10 'jazz':9 'jetty':4A 'loc':19,21 'nacht':3A 'netherlands':23 'oldies':11 'prerock':17 'scholte':8B 'vocal':18,20
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['nederlandstalig', 'netherlands', 'nederlands', 'oldies', 'dutch']
                                        'tag_date'  1937
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627309.5714827  (2021-05-21 22:01:49)
                             'size'  3470869