======================== unified (from filesystem) ========================
                                         'bitrate'  '63.696'
                                        'duration'  '1217'
                                          'artist'  'H.P. Lovecraft'
                                     'text_people'  ''
                                         'release'  'Short Horror Stories'
                                           'title'  'The Music of Erich Zann'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-OLDST-2', "
 "'Q-HHRNBTT-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['story', 'author', 'audiobook', 'book', 'psychedelic rock', 'psychedelic']"
                                     'discogstags'  "['non-music']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'nonmusic-speech-comedy or drama'
                                             'bpm'  '139.466'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 000000BA 000000BA 000062BE 00'
'COMM:iTunNORM:eng'                                 (' 000000BA 000000BA 000062BE 000071E8 0000630C 0000630C 00008000 00008000 '
 '00000F3C 00000F3C')
'TALB' (Album/Movie/Show title)                     'Short Horror Stories'
'TBPM' (BPM (beats per minute))                     '139.466'
'TCON' (Content type, a.k.a. Genre)                 'nonmusic-speech-comedy or drama'
'TIT2' (Title/songname/content description)         'The Music of Erich Zann'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'H.P. Lovecraft'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'non-music'
'TXXX:lastfmtags'                                   ['story', 'author', 'audiobook', 'book', 'psychedelic rock', 'psychedelic']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'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'                        '+6.33 dB'
'TXXX:replaygain_track_peak'                        '0.912173'

========================== row from database ==========================
                                              'id'  761212
                                            'path'  /data/Music/Bulk/0nonmusic/Short Horror Stories/The Music of Erich Zann.mp3
                                         'working'  None
                                         'bitrate'  63
                                    'duration_sec'  1217
                                           'genre'  nonmusic-speech-comedy or drama
                                        'filesize'  9976146
                                           'mtime'  1621853462
                                   'redo_metaread'  0
                                        'rest_str'   0nonmusic nonmusic speech comedy drama
                                      'tag_artist'  H.P. Lovecraft
                                     'tag_release'  Short Horror Stories
                                       'tag_title'  The Music of Erich Zann
                                             'bpm'  139.466
                                    'search_title'  'erich':4 'music':2 'of':3 'the':1 'zann':5
                                   'search_artist'  'h':1 'hp':3 'lovecraft':4 'p':2
                                  'search_release'  'horror':2 'short':1 'stories':3
                                     'search_rest'  '0nonmusic':1 'comedy':4 'drama':5 'nonmusic':2 'speech':3
                                    'search_combo'  '0nonmusic':13 'comedy':16 'drama':17 'erich':4A 'h':6B 'horror':11C 'hp':8B 'lovecraft':9B 'music':2A 'nonmusic':14 'of':3A 'p':7B 'short':10C 'speech':15 'stories':12C 'the':1A 'zann':5A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-1', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['story', 'author', 'audiobook', 'book', 'psychedelic rock', 'psychedelic']
                                        'tag_date'  
                                     'discogstags'  ['non-music']

============================== file details ==============================
                                           'mtime'  1621853462.009812  (2021-05-24 12:51:02)
                             'size'  9976146