======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '137'
                                          'artist'  'Edward M. Favor'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  'He Calls Me His Own Grace Darling'
                                           '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-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                     'discogstags'  "['pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1950'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '108.297'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '108.297'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1950'
'TIT2' (Title/songname/content description)         'He Calls Me His Own Grace Darling'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Edward M. Favor'
'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:discogstags'                                  'pop'
'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'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.17 dB'
'TXXX:replaygain_track_peak'                        '0.525533'

========================== row from database ==========================
                                              'id'  1452458
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1800/Edward M Favor - He Calls Me His Own Grace Darling 1899 Zonophone.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  137
                                           'genre'  prerock-vocal
                                        'filesize'  2758450
                                           'mtime'  1620665799
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1800 1899 Zonophone prerock vocal
                                      'tag_artist'  Edward M. Favor
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  He Calls Me His Own Grace Darling
                                             'bpm'  108.297
                                    'search_title'  'calls':2 'darling':7 'grace':6 'he':1 'his':4 'me':3 'own':5
                                   'search_artist'  'edward':1 'favor':4 'm':2,3
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '00oldiepop':5 '1800':6 '1899':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9 'vocal':10 'zonophone':8
                                    'search_combo'  '00oldiepop':21 '1800':22 '1899':23 'album':13C 'calls':2A 'country':20 'darling':7A 'edward':8B 'exotica':18 'favor':11B 'grace':6A 'he':1A 'his':4A 'jazz':17 'm':9B,10B 'me':3A 'non':12C 'nonalbum':14C 'oldies':19 'own':5A 'prerock':25 'tracks':15C,16C 'vocal':26 'zonophone':24
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  3A
                                           '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-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['q-chart-1', 'q-drums-1', 'q-vocals-4', 'q-other-1', 'q-busy-3', 'q-mixbeat-1', 'q-syn-1', 'q-play-2', 'q-piano-1', 'q-bass-1', 'q-grit-1']
                                        'tag_date'  1950
                                     'discogstags'  ['pop']

============================== file details ==============================
                                           'mtime'  1620665799.0389986  (2021-05-10 18:56:39)
                             'size'  2758450