======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '184'
                                          'artist'  'Al Bowlly'
                                     'text_people'  ''
                                         'release'  'Decca F 6877'
                                           'title'  'When Mother Nature Sings Her Lullaby (+ studio orchestra)'
                                           'quals'  ("['Q-JZFKS-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'q-syn-1', 'q-bass-1', 'q-busy-3', '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'  "['30s', 'oldies', 'jazz', 'pop', '1930s', 'crooner']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1938'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '114.6'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'TALB' (Album/Movie/Show title)                     'Decca F 6877'
'TBPM' (BPM (beats per minute))                     '114.6'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1938-11-11'
'TIT2' (Title/songname/content description)         'When Mother Nature Sings Her Lullaby (+ studio orchestra)'
'TKEY' (Initial key)                                '5A'
'TLEN' (Length)                                     '184000'
'TPE1' (Lead performer(s)/Soloist(s))               'Al Bowlly'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['30s', 'oldies', 'jazz', 'pop', '1930s', 'crooner']
'TXXX:q-bass'                                       '1'
'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-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.80 dB'
'TXXX:replaygain_track_peak'                        '0.500360'

========================== row from database ==========================
                                              'id'  1465709
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1938/Al Bowlly - When Mother Nature Sings Her Lullaby (studio orch) 11-11-1938.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  184
                                           'genre'  prerock-vocal
                                        'filesize'  3725877
                                           'mtime'  1620385218
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1938 (studio orch) 11 11 1938 prerock vocal
                                      'tag_artist'  Al Bowlly
                                     'tag_release'  Decca F 6877
                                       'tag_title'  When Mother Nature Sings Her Lullaby (+ studio orchestra)
                                             'bpm'  114.6
                                    'search_title'  'her':5 'lullaby':6 'mother':2 'nature':3 'orchestra':8,9 'sings':4 'studio':7 'when':1
                                   'search_artist'  'al':1 'bowlly':2
                                  'search_release'  '6877':3 'decca':1 'f':2
                                     'search_rest'  '00oldiepop':5 '1938':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'orch':9,10 'prerock':11 'studio':7,8 'vocal':12
                                    'search_combo'  '00oldiepop':19 '1938':20 '6877':14C 'al':10B 'bowlly':11B 'country':18 'decca':12C 'exotica':16 'f':13C 'her':5A 'jazz':15 'lullaby':6A 'mother':2A 'nature':3A 'oldies':17 'orch':23,24 'orchestra':8A,9A 'prerock':25 'sings':4A 'studio':7A,21,22 'vocal':26 'when':1A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  5A
                                           '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-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['30s', 'oldies', 'jazz', 'pop', '1930s', 'crooner']
                                        'tag_date'  1938
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620385218.224494  (2021-05-07 13:00:18)
                             'size'  3725877