======================== unified (from filesystem) ========================
                                         'bitrate'  '224.0'
                                        'duration'  '249'
                                          'artist'  'Nirvana'
                                     'text_people'  ''
                                         'release'  'Bleach'
                                           'title'  'Scoff'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-3', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['alternative rock', '90s', 'alternative', 'grunge', 'rock']"
                                     'discogstags'  "['rock', 'grunge', 'alternative rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  ''
                                            'date'  '1989'
                                        'comments'  ''
                                           'genre'  'rock-gr-grunge'
                                             'bpm'  '96.576'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Bleach'
'TBPM' (BPM (beats per minute))                     '96.576'
'TCON' (Content type, a.k.a. Genre)                 'rock-gr-grunge'
'TDRC' (Recording time)                             '1989'
'TIT2' (Title/songname/content description)         'Scoff'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Nirvana'
'TRCK' (Track number/Position in set)               '8'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'grunge', 'alternative rock']
'TXXX:lastfmtags'                                   ['alternative rock', '90s', 'alternative', 'grunge', 'rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-2.10 dB'
'TXXX:replaygain_track_peak'                        '0.723879'

========================== row from database ==========================
                                              'id'  1326066
                                            'path'  /data/Music/Bulk/00poprockelectronic/Nirvana/MBZ;#Nirvana;#Bleach;#08;#Scoff.mp3
                                         'working'  None
                                         'bitrate'  224
                                    'duration_sec'  249
                                           'genre'  rock-gr-grunge
                                        'filesize'  6999484
                                           'mtime'  1623497852
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic MBZ;#Nirvana;#Bleach;#08;#Scoff rock gr grunge
                                      'tag_artist'  Nirvana
                                     'tag_release'  Bleach
                                       'tag_title'  Scoff
                                             'bpm'  96.576
                                    'search_title'  'scoff':1
                                   'search_artist'  'nirvana':1
                                  'search_release'  'bleach':1
                                     'search_rest'  '00poprockelectronic':1 '08':5,10 'bleach':4,9 'gr':13 'grunge':14 'mbz':2,7 'nirvana':3,8 'rock':12 'scoff':6,11
                                    'search_combo'  '00poprockelectronic':4 '08':8,13 'bleach':3C,7,12 'gr':16 'grunge':17 'mbz':5,10 'nirvana':2B,6,11 'rock':15 'scoff':1A,9,14
                                    'tag_tracknum'  8
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-3']
                                      'lastfmtags'  ['alternative rock', '90s', 'alternative', 'grunge', 'rock']
                                        'tag_date'  1989
                                     'discogstags'  ['rock', 'grunge', 'alternative rock']

============================== file details ==============================
                                           'mtime'  1623497851.6317642  (2021-06-12 13:37:31)
                             'size'  6999484