======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '180'
                                          'artist'  'Mildred Bailey'
                                     'text_people'  ''
                                         'release'  '1920s and 1930s popular'
                                           'title'  "When It'S Sleepy Time Down South"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['female vocalists', 'jazz vocal', 'jazz', 'vocal jazz', 'jazz divas', "
 "'blues']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '125.315'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '1920s and 1930s popular'
'TBPM' (BPM (beats per minute))                     '125.315'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         "When It'S Sleepy Time Down South"
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '180791'
'TPE1' (Lead performer(s)/Soloist(s))               'Mildred Bailey'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['female vocalists', 'jazz vocal', 'jazz', 'vocal jazz', 'jazz divas', 'blues']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'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'                        '+2.46 dB'
'TXXX:replaygain_track_peak'                        '0.419943'

========================== row from database ==========================
                                              'id'  1498907
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Mildred Bailey - When It_S Sleepy Time Down South.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  180
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  2914544
                                           'mtime'  1620524704
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop It_S prerock jb jazz unsorted
                                      'tag_artist'  Mildred Bailey
                                     'tag_release'  1920s and 1930s popular
                                       'tag_title'  When It'S Sleepy Time Down South
                                             'bpm'  125.315
                                    'search_title'  'down':7 'it':2 'its':4 's':3 'sleepy':5 'south':8 'time':6 'when':1
                                   'search_artist'  'bailey':2 'mildred':1
                                  'search_release'  '1920s':1 '1930s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 'country':4 'exotica':2 'it':6 'jazz':1 'jb':9 'oldies':3 'prerock':8 's':7 'unsorted':10
                                    'search_combo'  '00oldiepop':19 '1920s':11C '1930s':13C 'and':12C 'bailey':10B 'country':18 'down':7A 'exotica':16 'it':2A,20 'its':4A 'jazz':15 'jb':23 'mildred':9B 'oldies':17 'popular':14C 'prerock':22 's':3A,21 'sleepy':5A 'south':8A 'time':6A 'unsorted':24 'when':1A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', '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-2', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['female vocalists', 'jazz vocal', 'jazz', 'vocal jazz', 'jazz divas', 'blues']
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620524703.8902056  (2021-05-09 03:45:03)
                             'size'  2914544