======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '241'
                                          'artist'  'Fats Waller'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Ain't Misbehavin'"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'Q-PLAY-2', 'q-syn-1', 'q-bass-2', 'q-busy-2', 'q-grit-1', "
 "'Q-PIANO-2', 'q-chart-1', 'q-drums-2', 'q-other-3', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['piano', 'jazz', 'blues', 'jazz piano', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1939'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '94.7'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'TBPM' (BPM (beats per minute))                     '94.7'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1939-08-02'
'TIT2' (Title/songname/content description)         "Ain't Misbehavin'"
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '241000'
'TPE1' (Lead performer(s)/Soloist(s))               'Fats Waller'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['piano', 'jazz', 'blues', 'jazz piano', 'swing']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.50 dB'
'TXXX:replaygain_track_peak'                        '0.515947'

========================== row from database ==========================
                                              'id'  1504889
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1939/Fats Waller - Ain_t Misbehavin_ 2-8-1939.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  241
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  4876951
                                           'mtime'  1620526823
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1939 Ain_t Misbehavin_ 2 8 1939 prerock jb jazz unsorted
                                      'tag_artist'  Fats Waller
                                     'tag_release'  None
                                       'tag_title'  Ain't Misbehavin'
                                             'bpm'  94.7
                                    'search_title'  'ain':1 'aint':3 'misbehavin':4,5 't':2
                                   'search_artist'  'fats':1 'waller':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1939':6 '2':10 '8':11 'ain':7 'country':4 'exotica':2 'jazz':1 'jb':13 'misbehavin':9 'oldies':3 'prerock':12 't':8 'unsorted':14
                                    'search_combo'  '00oldiepop':12 '1939':13 '2':17 '8':18 'ain':1A,14 'aint':3A 'country':11 'exotica':9 'fats':6B 'jazz':8 'jb':20 'misbehavin':4A,5A,16 'oldies':10 'prerock':19 't':2A,15 'unsorted':21 'waller':7B
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['piano', 'jazz', 'blues', 'jazz piano', 'swing']
                                        'tag_date'  1939
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620526822.8616834  (2021-05-09 04:20:22)
                             'size'  4876951