======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '177'
                                          'artist'  'Al Bowlly'
                                     'text_people'  ''
                                         'release'  'Decca F-3826, Matrix GB-6443-1'
                                           'title'  'Dark Clouds'
                                           'quals'  ("['Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-1', 'q-play-2', 'q-chart-2', "
 "'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'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '115.854'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Decca F-3826, Matrix GB-6443-1'
'TBPM' (BPM (beats per minute))                     '115.854'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         'Dark Clouds'
'TKEY' (Initial key)                                '5A'
'TLEN' (Length)                                     '177503'
'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'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'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'                        '+2.39 dB'
'TXXX:replaygain_track_peak'                        '0.677190'

========================== row from database ==========================
                                              'id'  1139820
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Lew Stone Duriam Dance Band, Al Bowlly - Dark clouds 1933.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  177
                                           'genre'  prerock-vocal
                                        'filesize'  2863104
                                           'mtime'  1620384559
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s and 1930s popular Lew Stone Duriam Dance Band, clouds 1933 prerock vocal
                                      'tag_artist'  Al Bowlly
                                     'tag_release'  Decca F-3826, Matrix GB-6443-1
                                       'tag_title'  Dark Clouds
                                             'bpm'  115.854
                                    'search_title'  'clouds':2 'dark':1
                                   'search_artist'  'al':1 'bowlly':2
                                  'search_release'  '1':8 '3826':3 '6443':7 'decca':1 'f':2 'f3826':4 'gb':6 'gb64431':9 'matrix':5
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':8 '1933':17 'and':7 'band':14,15 'clouds':16 'country':4 'dance':13 'duriam':12 'exotica':2 'jazz':1 'lew':10 'oldies':3 'popular':9 'prerock':18 'stone':11 'vocal':19
                                    'search_combo'  '00oldiepop':18 '1':12C '1920s':19 '1930s':21 '1933':30 '3826':7C '6443':11C 'al':3B 'and':20 'band':27,28 'bowlly':4B 'clouds':2A,29 'country':17 'dance':26 'dark':1A 'decca':5C 'duriam':25 'exotica':15 'f':6C 'f3826':8C 'gb':10C 'gb64431':13C 'jazz':14 'lew':23 'matrix':9C 'oldies':16 'popular':22 'prerock':31 'stone':24 'vocal':32
                                    '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-2', 'q-other-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['30s', 'oldies', 'jazz', 'pop', '1930s', 'crooner']
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620384559.3113291  (2021-05-07 12:49:19)
                             'size'  2863104