======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '179'
                                          'artist'  '[unknown]'
                                     'text_people'  ''
                                         'release'  'Historical speeches'
                                           'title'  'the hindenburg explodes'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-1', "
 "'q-chart-1', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1937'
                                        'comments'  ''
                                           'genre'  'nonmusic-speech-speeches'
                                             'bpm'  '84.175'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

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'TALB' (Album/Movie/Show title)                     'Historical speeches'
'TBPM' (BPM (beats per minute))                     '84.175'
'TCON' (Content type, a.k.a. Genre)                 'nonmusic-speech-speeches'
'TDRC' (Recording time)                             '1937'
'TIT2' (Title/songname/content description)         'the hindenburg explodes'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               '[unknown]'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:other'                                        'great speeches'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+3.07 dB'
'TXXX:replaygain_track_peak'                        '0.432912'

========================== row from database ==========================
                                              'id'  956337
                                            'path'  /data/Music/Bulk/0nonmusic/00speeches, fairly known people/the hindenburg explodes.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  179
                                           'genre'  nonmusic-speech-speeches
                                        'filesize'  2883584
                                           'mtime'  1620562171
                                   'redo_metaread'  0
                                        'rest_str'   0nonmusic 00speeches, fairly people nonmusic
                                      'tag_artist'  [unknown]
                                     'tag_release'  Historical speeches
                                       'tag_title'  the hindenburg explodes
                                             'bpm'  84.175
                                    'search_title'  'explodes':3 'hindenburg':2 'the':1
                                   'search_artist'  'unknown':1,2
                                  'search_release'  'historical':1 'speeches':2
                                     'search_rest'  '00speeches':2,3 '0nonmusic':1 'fairly':4 'nonmusic':6 'people':5
                                    'search_combo'  '00speeches':9,10 '0nonmusic':8 'explodes':3A 'fairly':11 'hindenburg':2A 'historical':6C 'nonmusic':13 'people':12 'speeches':7C 'the':1A 'unknown':4B,5B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-1', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['mysterious', 'unknown', 'all', 'mistagged artist', 'rock']
                                        'tag_date'  1937
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562170.6270397  (2021-05-09 14:09:30)
                             'size'  2883584