======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '184'
                                          'artist'  'Nat King Cole'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "What'll I Do"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', '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'  "['blues', 'jazz', 'jazz vocal', 'oldies', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1947'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '145.4'
                                             '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))                     '145.4'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1947-08-06'
'TIT2' (Title/songname/content description)         "What'll I Do"
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '184000'
'TPE1' (Lead performer(s)/Soloist(s))               'Nat King Cole'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['blues', 'jazz', 'jazz vocal', 'oldies', 'swing']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'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'                        '+2.73 dB'
'TXXX:replaygain_track_peak'                        '0.767610'

========================== row from database ==========================
                                              'id'  1519957
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1947/Nat King Cole - What_ll I Do 6-8-1947.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  184
                                           'genre'  prerock-swing
                                        'filesize'  3774632
                                           'mtime'  1620562189
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1947 What_ll 6 8 1947 prerock swing
                                      'tag_artist'  Nat King Cole
                                     'tag_release'  None
                                       'tag_title'  What'll I Do
                                             'bpm'  145.4
                                    'search_title'  'do':5 'i':4 'll':2 'what':1 'whatll':3
                                   'search_artist'  'cole':3 'king':2 'nat':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1947':6 '6':9 '8':10 'country':4 'exotica':2 'jazz':1 'll':8 'oldies':3 'prerock':11 'swing':12 'what':7
                                    'search_combo'  '00oldiepop':13 '1947':14 '6':17 '8':18 'cole':8B 'country':12 'do':5A 'exotica':10 'i':4A 'jazz':9 'king':7B 'll':2A,16 'nat':6B 'oldies':11 'prerock':19 'swing':20 'what':1A,15 'whatll':3A
                                    '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-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['blues', 'jazz', 'jazz vocal', 'oldies', 'swing']
                                        'tag_date'  1947
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562189.4127922  (2021-05-09 14:09:49)
                             'size'  3774632