======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '184'
                                          'artist'  'Greta Keller'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "You're A Sweetheart (+ Ramblers)"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-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-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['female voices', 'broadway', '30s', '40s', 'myhitparade']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1938'
                                        'comments'  ''
                                           'genre'  'prerock-showtunes'
                                             'bpm'  '120.1'
                                             'key'  '6B'
                                        '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))                     '120.1'
'TCON' (Content type, a.k.a. Genre)                 'prerock-showtunes'
'TDRC' (Recording time)                             '1938-03-24'
'TIT2' (Title/songname/content description)         "You're A Sweetheart (+ Ramblers)"
'TKEY' (Initial key)                                '6B'
'TLEN' (Length)                                     '184000'
'TPE1' (Lead performer(s)/Soloist(s))               'Greta Keller'
'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:lastfmtags'                                   ['female voices', 'broadway', '30s', '40s', 'myhitparade']
'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'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.63 dB'
'TXXX:replaygain_track_peak'                        '0.798417'

========================== row from database ==========================
                                              'id'  1510586
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1938/Greta Keller - You_re A Sweetheart (+ Ramblers) 24-3-1938.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  184
                                           'genre'  prerock-showtunes
                                        'filesize'  3801944
                                           'mtime'  1621703180
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1938 You_re 24 3 1938 prerock showtunes
                                      'tag_artist'  Greta Keller
                                     'tag_release'  None
                                       'tag_title'  You're A Sweetheart (+ Ramblers)
                                             'bpm'  120.1
                                    'search_title'  'a':4 'ramblers':6,7 're':2 'sweetheart':5 'you':1 'youre':3
                                   'search_artist'  'greta':1 'keller':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1938':6 '24':9 '3':10 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':11 're':8 'showtunes':12 'you':7
                                    'search_combo'  '00oldiepop':14 '1938':15 '24':18 '3':19 'a':4A 'country':13 'exotica':11 'greta':8B 'jazz':10 'keller':9B 'oldies':12 'prerock':20 'ramblers':6A,7A 're':2A,17 'showtunes':21 'sweetheart':5A 'you':1A,16 'youre':3A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6B
                                           '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-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['female voices', 'broadway', '30s', '40s', 'myhitparade']
                                        'tag_date'  1938
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621703179.9046705  (2021-05-22 19:06:19)
                             'size'  3801944