======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '161'
                                          'artist'  'Billy Murray'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  'I Love A Piano'
                                           '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-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['all', 'really really oldies', 'music hall', 'vaudeville', 'real oldies', "
 "'gramophone']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1916'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '84.561'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '84.561'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1916'
'TIT2' (Title/songname/content description)         'I Love A Piano'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'Billy Murray'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['all',
 'really really oldies',
 'music hall',
 'vaudeville',
 'real oldies',
 'gramophone']
'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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.82 dB'
'TXXX:replaygain_track_peak'                        '0.486303'

========================== row from database ==========================
                                              'id'  1443279
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1916/Billy Murray - I Love A Piano -1-1916.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  161
                                           'genre'  prerock-vocal
                                        'filesize'  3229502
                                           'mtime'  1620666247
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1916 1 1916 prerock vocal
                                      'tag_artist'  Billy Murray
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  I Love A Piano
                                             'bpm'  84.561
                                    'search_title'  'a':3 'i':1 'love':2 'piano':4
                                   'search_artist'  'billy':1 'murray':2
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '00oldiepop':5 '1':7 '1916':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8 'vocal':9
                                    'search_combo'  '00oldiepop':16 '1':18 '1916':17 'a':3A 'album':8C 'billy':5B 'country':15 'exotica':13 'i':1A 'jazz':12 'love':2A 'murray':6B 'non':7C 'nonalbum':9C 'oldies':14 'piano':4A 'prerock':19 'tracks':10C,11C 'vocal':20
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', '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-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['all', 'really really oldies', 'music hall', 'vaudeville', 'real oldies', 'gramophone']
                                        'tag_date'  1916
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620666247.0396652  (2021-05-10 19:04:07)
                             'size'  3229502