======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '178'
                                          'artist'  'Syd Seymour Mad Hatters'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Chinese Laundry Blues (vocal - Bobby Farrell)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1937'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '108.9'
                                             '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))                     '108.9'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1937-12-18'
'TIT2' (Title/songname/content description)         'Chinese Laundry Blues (vocal - Bobby Farrell)'
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '178000'
'TPE1' (Lead performer(s)/Soloist(s))               'Syd Seymour Mad Hatters'
'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'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.45 dB'
'TXXX:replaygain_track_peak'                        '0.547090'

========================== row from database ==========================
                                              'id'  1473413
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1937/Syd Seymour Mad Hatters - Chinese Laundry Blues (vocal - Bobby Farrell) 18-12-1937.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  178
                                           'genre'  prerock-unsorted
                                        'filesize'  3608348
                                           'mtime'  1621698007
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1937 18 12 1937 prerock unsorted
                                      'tag_artist'  Syd Seymour Mad Hatters
                                     'tag_release'  None
                                       'tag_title'  Chinese Laundry Blues (vocal - Bobby Farrell)
                                             'bpm'  108.9
                                    'search_title'  'blues':3 'bobby':6 'chinese':1 'farrell':7,8 'laundry':2 'vocal':4,5
                                   'search_artist'  'hatters':4 'mad':3 'seymour':2 'syd':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '18':7 '1937':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8 'unsorted':9
                                    'search_combo'  '00oldiepop':17 '18':19 '1937':18 'blues':3A 'bobby':6A 'chinese':1A 'country':16 'exotica':14 'farrell':7A,8A 'hatters':12B 'jazz':13 'laundry':2A 'mad':11B 'oldies':15 'prerock':20 'seymour':10B 'syd':9B 'unsorted':21 'vocal':4A,5A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6A
                                           '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-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1937
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698007.1003728  (2021-05-22 17:40:07)
                             'size'  3608348