======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '176'
                                          'artist'  'Bessie Smith'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Baby Won't You Please Come Home Blues"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-1', 'q-vocals-4', 'q-mixbeat-1', "
 "'Q-PIANO-3']")
                                      'lastfmtags'  "['jazz vocal', 'blues', 'jazz', 'female vocalists', 'classic blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1923'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '145.3'
                                             'key'  '8A'
                                        '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))                     '145.3'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1923-04-11'
'TIT2' (Title/songname/content description)         "Baby Won't You Please Come Home Blues"
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '176000'
'TPE1' (Lead performer(s)/Soloist(s))               'Bessie Smith'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['jazz vocal', 'blues', 'jazz', 'female vocalists', 'classic blues']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.01 dB'
'TXXX:replaygain_track_peak'                        '0.574275'

========================== row from database ==========================
                                              'id'  1508662
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1923/Bessie Smith - Baby Won_t You Please Come Home Blues 11-4-1923.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  176
                                           'genre'  prerock-vocal
                                        'filesize'  3562643
                                           'mtime'  1620666382
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1923 Won_t 11 4 1923 prerock vocal
                                      'tag_artist'  Bessie Smith
                                     'tag_release'  None
                                       'tag_title'  Baby Won't You Please Come Home Blues
                                             'bpm'  145.3
                                    'search_title'  'baby':1 'blues':9 'come':7 'home':8 'please':6 't':3 'won':2 'wont':4 'you':5
                                   'search_artist'  'bessie':1 'smith':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1923':6 '4':9 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':10 't':8 'vocal':11 'won':7
                                    'search_combo'  '00oldiepop':16 '1923':17 '4':20 'baby':1A 'bessie':10B 'blues':9A 'come':7A 'country':15 'exotica':13 'home':8A 'jazz':12 'oldies':14 'please':6A 'prerock':21 'smith':11B 't':3A,19 'vocal':22 'won':2A,18 'wont':4A 'you':5A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-3', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['jazz vocal', 'blues', 'jazz', 'female vocalists', 'classic blues']
                                        'tag_date'  1923
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620666382.31055  (2021-05-10 19:06:22)
                             'size'  3562643