======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '147'
                                          'artist'  'Ivor Moreton & Dave Kaye piano duet'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Quickstep Medley'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'Q-PLAY-2', 'q-bass-2', 'q-busy-3', 'q-grit-1', "
 "'Q-PIANO-4', 'q-chart-1', 'q-drums-1', 'q-other-3', 'q-vocals-1', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1936'
                                        'comments'  ''
                                           'genre'  'prerock-instrumental'
                                             'bpm'  '123.0'
                                             'key'  '9A'
                                        '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))                     '123.0'
'TCON' (Content type, a.k.a. Genre)                 'prerock-instrumental'
'TDRC' (Recording time)                             '1936-02-21'
'TIT2' (Title/songname/content description)         'Quickstep Medley'
'TKEY' (Initial key)                                '9A'
'TLEN' (Length)                                     '147000'
'TPE1' (Lead performer(s)/Soloist(s))               'Ivor Moreton & Dave Kaye piano duet'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '2'
'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-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.00 dB'
'TXXX:replaygain_track_peak'                        '0.644055'

========================== row from database ==========================
                                              'id'  1472804
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1936/Ivor Moreton & Dave Kaye piano duet - Quickstep Medley 21-2-1936.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  147
                                           'genre'  prerock-instrumental
                                        'filesize'  3027658
                                           'mtime'  1621705384
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1936 21 2 1936 prerock instrumental
                                      'tag_artist'  Ivor Moreton & Dave Kaye piano duet
                                     'tag_release'  None
                                       'tag_title'  Quickstep Medley
                                             'bpm'  123.0
                                    'search_title'  'medley':2 'quickstep':1
                                   'search_artist'  'dave':3 'duet':6 'ivor':1 'kaye':4 'moreton':2 'piano':5
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1936':6 '2':8 '21':7 'country':4 'exotica':2 'instrumental':10 'jazz':1 'oldies':3 'prerock':9
                                    'search_combo'  '00oldiepop':13 '1936':14 '2':16 '21':15 'country':12 'dave':5B 'duet':8B 'exotica':10 'instrumental':18 'ivor':3B 'jazz':9 'kaye':6B 'medley':2A 'moreton':4B 'oldies':11 'piano':7B 'prerock':17 'quickstep':1A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1936
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621705384.1261153  (2021-05-22 19:43:04)
                             'size'  3027658