======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '167'
                                          'artist'  'Benny Goodman'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "There'll Be Some Changes Made (vocal - Louise Tobin)"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['big band', 'jazz', 'clarinet', 'oldies', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1939'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '116.4'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'COMM:MusicMatch_Tempo:eng'                         'None'
'TBPM' (BPM (beats per minute))                     '116.4'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1939-08-10'
'TIT2' (Title/songname/content description)         "There'll Be Some Changes Made (vocal - Louise Tobin)"
'TKEY' (Initial key)                                '10A'
'TLEN' (Length)                                     '167000'
'TPE1' (Lead performer(s)/Soloist(s))               'Benny Goodman'
'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'                                   ['big band', 'jazz', 'clarinet', 'oldies', 'swing']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+2.17 dB'
'TXXX:replaygain_track_peak'                        '0.447021'

========================== row from database ==========================
                                              'id'  1502400
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1939/Benny Goodman - There_ll Be Some Changes Made (vocal - Louise Tobin) 10-8-1939.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  167
                                           'genre'  prerock-swing
                                        'filesize'  3415042
                                           'mtime'  1620561386
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1939 There_ll 10 8 1939 prerock swing
                                      'tag_artist'  Benny Goodman
                                     'tag_release'  None
                                       'tag_title'  There'll Be Some Changes Made (vocal - Louise Tobin)
                                             'bpm'  116.4
                                    'search_title'  'be':4 'changes':6 'll':2 'louise':10 'made':7 'some':5 'there':1 'therell':3 'tobin':11,12 'vocal':8,9
                                   'search_artist'  'benny':1 'goodman':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1939':6 '8':9 'country':4 'exotica':2 'jazz':1 'll':8 'oldies':3 'prerock':10 'swing':11 'there':7
                                    'search_combo'  '00oldiepop':19 '1939':20 '8':23 'be':4A 'benny':13B 'changes':6A 'country':18 'exotica':16 'goodman':14B 'jazz':15 'll':2A,22 'louise':10A 'made':7A 'oldies':17 'prerock':24 'some':5A 'swing':25 'there':1A,21 'therell':3A 'tobin':11A,12A 'vocal':8A,9A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['big band', 'jazz', 'clarinet', 'oldies', 'swing']
                                        'tag_date'  1939
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561385.6699023  (2021-05-09 13:56:25)
                             'size'  3415042