======================== unified (from filesystem) ========================
                                         'bitrate'  '96.0'
                                        'duration'  '173'
                                          'artist'  'Paul Whiteman & His Orchestra Feat. Bing Crosby'
                                     'text_people'  ''
                                         'release'  'Billboard 1928'
                                           'title'  'Changes'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '032'
                                      'tracktotal'  ''
                                            'date'  '1928'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '105.368'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         'Debuted 1928 and peaked at #4 on Various Charts. Source: Pop Memories'
'COMM:ID3v1 Comment:XXX'                            'Debuted 1928 and peaked at #'
'TALB' (Album/Movie/Show title)                     'Billboard 1928'
'TBPM' (BPM (beats per minute))                     '105.368'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1928'
'TIT2' (Title/songname/content description)         'Changes'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Paul Whiteman & His Orchestra Feat. Bing Crosby'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '032'
'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:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'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'                        '+1.60 dB'
'TXXX:replaygain_track_peak'                        '0.568785'

========================== row from database ==========================
                                              'id'  978053
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Billboard 1928/1928_032 - Paul Whiteman & His Orchestra Feat. Bing Crosby - Changes 96 M (2.53).mp3
                                         'working'  None
                                         'bitrate'  96
                                    'duration_sec'  173
                                           'genre'  prerock-swing
                                        'filesize'  2084736
                                           'mtime'  1620562687
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 1928_032 96 M (2.53) prerock swing
                                      'tag_artist'  Paul Whiteman & His Orchestra Feat. Bing Crosby
                                     'tag_release'  Billboard 1928
                                       'tag_title'  Changes
                                             'bpm'  105.368
                                    'search_title'  'changes':1
                                   'search_artist'  'bing':7 'crosby':8 'feat':5,6 'his':3 'orchestra':4 'paul':1 'whiteman':2
                                  'search_release'  '1928':2 'billboard':1
                                     'search_rest'  '032':6 '1928':5 '2':9 '253':11 '53':10 '96':7 'country':4 'exotica':2 'jazz':1 'm':8 'oldies':3 'prerock':12 'swing':13
                                    'search_combo'  '032':17 '1928':11C,16 '2':20 '253':22 '53':21 '96':18 'billboard':10C 'bing':8B 'changes':1A 'country':15 'crosby':9B 'exotica':13 'feat':6B,7B 'his':4B 'jazz':12 'm':19 'oldies':14 'orchestra':5B 'paul':2B 'prerock':23 'swing':24 'whiteman':3B
                                    'tag_tracknum'  32
                                      'num_images'  0
                                             'key'  3A
                                           '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-2', 'q-other-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1928
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562686.8789783  (2021-05-09 14:18:06)
                             'size'  2084736