======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '223'
                                          'artist'  'Scott Joplin'
                                     'text_people'  ''
                                         'release'  'piano roll'
                                           'title'  'Fig Leaf Rag'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-2', '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-4', 'q-vocals-1', 'q-mixbeat-1', "
 "'Q-PIANO-3']")
                                      'lastfmtags'  "['classical', 'jazz', 'instrumental', 'ragtime', 'piano']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1908'
                                        'comments'  ''
                                           'genre'  'prerock-ragtime'
                                             'bpm'  '108.413'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'piano roll'
'TBPM' (BPM (beats per minute))                     '108.413'
'TCON' (Content type, a.k.a. Genre)                 'prerock-ragtime'
'TDRC' (Recording time)                             '1908'
'TIT2' (Title/songname/content description)         'Fig Leaf Rag'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Scott Joplin'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['classical', 'jazz', 'instrumental', 'ragtime', 'piano']
'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'                                      '4'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.82 dB'
'TXXX:replaygain_track_peak'                        '0.494626'

========================== row from database ==========================
                                              'id'  1441116
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1908/Scott Joplin piano roll - Fig Leaf Rag 1908.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  223
                                           'genre'  prerock-ragtime
                                        'filesize'  4472626
                                           'mtime'  1620526456
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1908 1908 prerock ragtime
                                      'tag_artist'  Scott Joplin
                                     'tag_release'  piano roll
                                       'tag_title'  Fig Leaf Rag
                                             'bpm'  108.413
                                    'search_title'  'fig':1 'leaf':2 'rag':3
                                   'search_artist'  'joplin':2 'scott':1
                                  'search_release'  'piano':1 'roll':2
                                     'search_rest'  '00oldiepop':5 '1908':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':7 'ragtime':8
                                    'search_combo'  '00oldiepop':12 '1908':13 'country':11 'exotica':9 'fig':1A 'jazz':8 'joplin':5B 'leaf':2A 'oldies':10 'piano':6C 'prerock':14 'rag':3A 'ragtime':15 'roll':7C 'scott':4B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-3', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['classical', 'jazz', 'instrumental', 'ragtime', 'piano']
                                        'tag_date'  1908
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620526455.6615336  (2021-05-09 04:14:15)
                             'size'  4472626