======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '129'
                                          'artist'  'Ruth Etting'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Zing Went The Strings Of My Heart'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-3', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['20s', 'jazz', 'oldies', '30s', 'female vocalists', 'roaring 20s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '145.7'
                                             'key'  '9A'
                                        '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))                     '145.7'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         'Zing Went The Strings Of My Heart'
'TKEY' (Initial key)                                '9A'
'TLEN' (Length)                                     '129000'
'TPE1' (Lead performer(s)/Soloist(s))               'Ruth Etting'
'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'                                   ['20s', 'jazz', 'oldies', '30s', 'female vocalists', 'roaring 20s']
'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'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.36 dB'
'TXXX:replaygain_track_peak'                        '0.646781'

========================== row from database ==========================
                                              'id'  1467794
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1935/Ruth Etting - Zing Went The Strings Of My Heart 1935.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  129
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  2633751
                                           'mtime'  1620526233
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1935 1935 prerock jb jazz unsorted
                                      'tag_artist'  Ruth Etting
                                     'tag_release'  None
                                       'tag_title'  Zing Went The Strings Of My Heart
                                             'bpm'  145.7
                                    'search_title'  'heart':7 'my':6 'of':5 'strings':4 'the':3 'went':2 'zing':1
                                   'search_artist'  'etting':2 'ruth':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1935':6 'country':4 'exotica':2 'jazz':1 'jb':8 'oldies':3 'prerock':7 'unsorted':9
                                    'search_combo'  '00oldiepop':14 '1935':15 'country':13 'etting':9B 'exotica':11 'heart':7A 'jazz':10 'jb':17 'my':6A 'of':5A 'oldies':12 'prerock':16 'ruth':8B 'strings':4A 'the':3A 'unsorted':18 'went':2A 'zing':1A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', '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'  ['20s', 'jazz', 'oldies', '30s', 'female vocalists', 'roaring 20s']
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620526233.2229953  (2021-05-09 04:10:33)
                             'size'  2633751