======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '198'
                                          'artist'  'Ida Cox'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "I Ain't Gonna Let Nobody Break My Heart"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', '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-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues', 'jazz', 'female vocalist', 'oldies', 'blues singer']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1940'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-vocal'
                                             'bpm'  '128.5'
                                             'key'  '7A'
                                        '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))                     '128.5'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-vocal'
'TDRC' (Recording time)                             '1940-12-20'
'TIT2' (Title/songname/content description)         "I Ain't Gonna Let Nobody Break My Heart"
'TKEY' (Initial key)                                '7A'
'TLEN' (Length)                                     '198000'
'TPE1' (Lead performer(s)/Soloist(s))               'Ida Cox'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['blues', 'jazz', 'female vocalist', 'oldies', 'blues singer']
'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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.83 dB'
'TXXX:replaygain_track_peak'                        '0.542473'

========================== row from database ==========================
                                              'id'  1520694
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1940/Ida Cox - I Ain_t Gonna Let Nobody Break My Heart 20-12-1940.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  198
                                           'genre'  prerock-jb-jazz-vocal
                                        'filesize'  4015493
                                           'mtime'  1620527145
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1940 Ain_t 20 12 1940 prerock jb jazz vocal
                                      'tag_artist'  Ida Cox
                                     'tag_release'  None
                                       'tag_title'  I Ain't Gonna Let Nobody Break My Heart
                                             'bpm'  128.5
                                    'search_title'  'ain':2 'aint':4 'break':8 'gonna':5 'heart':10 'i':1 'let':6 'my':9 'nobody':7 't':3
                                   'search_artist'  'cox':2 'ida':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1940':6 '20':9 'ain':7 'country':4 'exotica':2 'jazz':1 'jb':11 'oldies':3 'prerock':10 't':8 'vocal':12
                                    'search_combo'  '00oldiepop':17 '1940':18 '20':21 'ain':2A,19 'aint':4A 'break':8A 'country':16 'cox':12B 'exotica':14 'gonna':5A 'heart':10A 'i':1A 'ida':11B 'jazz':13 'jb':23 'let':6A 'my':9A 'nobody':7A 'oldies':15 'prerock':22 't':3A,20 'vocal':24
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', '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-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['blues', 'jazz', 'female vocalist', 'oldies', 'blues singer']
                                        'tag_date'  1940
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620527144.9126804  (2021-05-09 04:25:44)
                             'size'  4015493