======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '342'
                                          'artist'  'Willy Walden & Piet Muyselaar'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Snip En Snap Op Waschdag (Persil Reclame Plaat)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1938'
                                        'comments'  ''
                                           'genre'  'loc-eur-netherlands'
                                             'bpm'  '123.482'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '123.482'
'TCON' (Content type, a.k.a. Genre)                 'loc-eur-netherlands'
'TDRC' (Recording time)                             '1938'
'TIT2' (Title/songname/content description)         'Snip En Snap Op Waschdag (Persil Reclame Plaat)'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Willy Walden & Piet Muyselaar'
'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:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'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'                        '+2.30 dB'
'TXXX:replaygain_track_peak'                        '0.664832'

========================== row from database ==========================
                                              'id'  1448376
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1938/Willy Walden & Piet Muyselaar - Snip En Snap Op Waschdag (Persil Reclame Plaat) 1938.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  342
                                           'genre'  loc-eur-netherlands
                                        'filesize'  6854450
                                           'mtime'  1621627445
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1938 1938 loc eur netherlands
                                      'tag_artist'  Willy Walden & Piet Muyselaar
                                     'tag_release'  None
                                       'tag_title'  Snip En Snap Op Waschdag (Persil Reclame Plaat)
                                             'bpm'  123.482
                                    'search_title'  'en':2 'op':4 'persil':6,7 'plaat':9,10 'reclame':8 'snap':3 'snip':1 'waschdag':5
                                   'search_artist'  'muyselaar':4 'piet':3 'walden':2 'willy':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1938':6 'country':4 'eur':8 'exotica':2 'jazz':1 'loc':7 'netherlands':9 'oldies':3
                                    'search_combo'  '00oldiepop':19 '1938':20 'country':18 'en':2A 'eur':22 'exotica':16 'jazz':15 'loc':21 'muyselaar':14B 'netherlands':23 'oldies':17 'op':4A 'persil':6A,7A 'piet':13B 'plaat':9A,10A 'reclame':8A 'snap':3A 'snip':1A 'walden':12B 'waschdag':5A 'willy':11B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           '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-2', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1938
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627445.1982486  (2021-05-21 22:04:05)
                             'size'  6854450