======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '175'
                                          'artist'  'John McCormack'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  'When Night Descends'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-3', '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-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['irish folk', 'celtic', 'classical', 'tenor']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1920'
                                        'comments'  ''
                                           'genre'  'prerock-vocal-folk'
                                             'bpm'  '143.721'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '143.721'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal-folk'
'TDRC' (Recording time)                             '1920'
'TIT2' (Title/songname/content description)         'When Night Descends'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'John McCormack'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['irish folk', 'celtic', 'classical', 'tenor']
'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'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.10 dB'
'TXXX:replaygain_track_peak'                        '0.737879'

========================== row from database ==========================
                                              'id'  1431253
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920/John McCormack - When Night Descends (Rachmaninov) 2-4-1920.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  175
                                           'genre'  prerock-vocal-folk
                                        'filesize'  3520329
                                           'mtime'  1621625677
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920 (Rachmaninov) 2 4 1920 prerock vocal folk
                                      'tag_artist'  John McCormack
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  When Night Descends
                                             'bpm'  143.721
                                    'search_title'  'descends':3 'night':2 'when':1
                                   'search_artist'  'cormack':4 'john':1 'mc':3 'mccormack':2
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '00oldiepop':5 '1920':6 '2':9 '4':10 'country':4 'exotica':2 'folk':13 'jazz':1 'oldies':3 'prerock':11 'rachmaninov':7,8 'vocal':12
                                    'search_combo'  '00oldiepop':17 '1920':18 '2':21 '4':22 'album':9C 'cormack':7B 'country':16 'descends':3A 'exotica':14 'folk':25 'jazz':13 'john':4B 'mc':6B 'mccormack':5B 'night':2A 'non':8C 'nonalbum':10C 'oldies':15 'prerock':23 'rachmaninov':19,20 'tracks':11C,12C 'vocal':24 'when':1A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', '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-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['irish folk', 'celtic', 'classical', 'tenor']
                                        'tag_date'  1920
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621625676.9273715  (2021-05-21 21:34:36)
                             'size'  3520329