======================== unified (from filesystem) ========================
                                         'bitrate'  '112.0'
                                        'duration'  '191'
                                          'artist'  'Ruth Etting'
                                     'text_people'  ''
                                         'release'  '20s and 30s popular'
                                           'title'  "Ain't Misbehavin'"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['20s', 'jazz', 'oldies', '30s', 'female vocalists', 'roaring 20s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1925'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-vocal'
                                             'bpm'  '91.308'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '20s and 30s popular'
'TBPM' (BPM (beats per minute))                     '91.308'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-vocal'
'TDRC' (Recording time)                             '1925'
'TIT2' (Title/songname/content description)         "Ain't Misbehavin'"
'TKEY' (Initial key)                                '10A'
'TLEN' (Length)                                     '190932'
'TPE1' (Lead performer(s)/Soloist(s))               'Ruth Etting'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['20s', 'jazz', 'oldies', '30s', 'female vocalists', 'roaring 20s']
'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'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.34 dB'
'TXXX:replaygain_track_peak'                        '0.490850'

========================== row from database ==========================
                                              'id'  1500317
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Ruth Etting - Ain_t Misbehavin_.mp3
                                         'working'  None
                                         'bitrate'  112
                                    'duration_sec'  191
                                           'genre'  prerock-jb-jazz-vocal
                                        'filesize'  2697223
                                           'mtime'  1620524781
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s Ain_t Misbehavin_ prerock jb jazz vocal
                                      'tag_artist'  Ruth Etting
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  Ain't Misbehavin'
                                             'bpm'  91.308
                                    'search_title'  'ain':1 'aint':3 'misbehavin':4,5 't':2
                                   'search_artist'  'etting':2 'ruth':1
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':7 'ain':8 'country':4 'exotica':2 'jazz':1 'jb':12 'misbehavin':10 'oldies':3 'prerock':11 't':9 'vocal':13
                                    'search_combo'  '00oldiepop':16 '1920s':17 '1930s':18 '20s':8C '30s':10C 'ain':1A,19 'aint':3A 'and':9C 'country':15 'etting':7B 'exotica':13 'jazz':12 'jb':23 'misbehavin':4A,5A,21 'oldies':14 'popular':11C 'prerock':22 'ruth':6B 't':2A,20 'vocal':24
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', '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'  ['20s', 'jazz', 'oldies', '30s', 'female vocalists', 'roaring 20s']
                                        'tag_date'  1925
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620524781.2133205  (2021-05-09 03:46:21)
                             'size'  2697223