======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '151'
                                          'artist'  'Artie Shaw & Helen Forrest'
                                     'text_people'  ''
                                         'release'  '20s and 30s popular'
                                           'title'  "Let's Stop The Clock"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', 'big band', '40s', '50s', '60s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1938'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '142.108'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'PRIV:AverageLevel:6\x16\x00\x00'                   PRIV(owner='AverageLevel', data=b'6\x16\x00\x00')
'PRIV:PeakValue:ÿ\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xff\x7f\x00\x00')
'TALB' (Album/Movie/Show title)                     '20s and 30s popular'
'TBPM' (BPM (beats per minute))                     '142.108'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1938'
'TIT2' (Title/songname/content description)         "Let's Stop The Clock"
'TKEY' (Initial key)                                '7A'
'TLEN' (Length)                                     '151165'
'TPE1' (Lead performer(s)/Soloist(s))               'Artie Shaw & Helen Forrest'
'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'                                   ['jazz', 'big band', '40s', '50s', '60s']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '-1.69 dB'
'TXXX:replaygain_track_peak'                        '0.714063'

========================== row from database ==========================
                                              'id'  1511743
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Artie Shaw, Helen Forrest - Let_s Stop The Clock (1938).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  151
                                           'genre'  prerock-swing
                                        'filesize'  2433805
                                           'mtime'  1620559502
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s Shaw, Let_s (1938) prerock swing
                                      'tag_artist'  Artie Shaw & Helen Forrest
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  Let's Stop The Clock
                                             'bpm'  142.108
                                    'search_title'  'clock':6 'let':1 'lets':3 's':2 'stop':4 'the':5
                                   'search_artist'  'artie':1 'forrest':4 'helen':3 'shaw':2
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':7 '1938':12,13 'country':4 'exotica':2 'jazz':1 'let':10 'oldies':3 'prerock':14 's':11 'shaw':8,9 'swing':15
                                    'search_combo'  '00oldiepop':19 '1920s':20 '1930s':21 '1938':26,27 '20s':11C '30s':13C 'and':12C 'artie':7B 'clock':6A 'country':18 'exotica':16 'forrest':10B 'helen':9B 'jazz':15 'let':1A,24 'lets':3A 'oldies':17 'popular':14C 'prerock':28 's':2A,25 'shaw':8B,22,23 'stop':4A 'swing':29 'the':5A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-3', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['jazz', 'big band', '40s', '50s', '60s']
                                        'tag_date'  1938
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620559501.7023084  (2021-05-09 13:25:01)
                             'size'  2433805