======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '175'
                                          'artist'  'Fats Waller'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "T Ain't Nobody's Biz-ness If I Do"
                                           '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-1', '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'  '1940'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '120.3'
                                             '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))                     '120.3'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1940-11-06'
'TIT2' (Title/songname/content description)         "T Ain't Nobody's Biz-ness If I Do"
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '175000'
'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'                                       '1'
'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'                        '+2.86 dB'
'TXXX:replaygain_track_peak'                        '0.633230'

========================== row from database ==========================
                                              'id'  1508205
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1940/Fats Waller - Tain_t Nobody_s Business If I Do 6-11-1940.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  175
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  3557783
                                           'mtime'  1620527140
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1940 Tain_t Nobody_s Business 6 11 1940 prerock jb jazz unsorted
                                      'tag_artist'  Fats Waller
                                     'tag_release'  None
                                       'tag_title'  T Ain't Nobody's Biz-ness If I Do
                                             'bpm'  120.3
                                    'search_title'  'ain':2 'aint':4 'biz':8 'bizness':10 'do':13 'i':12 'if':11 'ness':9 'nobody':5 'nobodys':7 's':6 't':1,3
                                   'search_artist'  'fats':1 'waller':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1940':6 '6':12 'business':11 'country':4 'exotica':2 'jazz':1 'jb':14 'nobody':9 'oldies':3 'prerock':13 's':10 't':8 'tain':7 'unsorted':15
                                    'search_combo'  '00oldiepop':20 '1940':21 '6':27 'ain':2A 'aint':4A 'biz':8A 'bizness':10A 'business':26 'country':19 'do':13A 'exotica':17 'fats':14B 'i':12A 'if':11A 'jazz':16 'jb':29 'ness':9A 'nobody':5A,24 'nobodys':7A 'oldies':18 'prerock':28 's':6A,25 't':1A,3A,23 'tain':22 'unsorted':30 'waller':15B
                                    '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-1', 'q-grit-1']
                                      'lastfmtags'  ['piano', 'jazz', 'blues', 'jazz piano', 'swing']
                                        'tag_date'  1940
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620527139.6486824  (2021-05-09 04:25:39)
                             'size'  3557783