======================== unified (from filesystem) ========================
                                         'bitrate'  '224.0'
                                        'duration'  '168'
                                          'artist'  'Nirvana'
                                     'text_people'  ''
                                         'release'  'Incesticide'
                                           'title'  'Son of a Gun'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-3', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['alternative rock', '90s', 'alternative', 'grunge', 'rock']"
                                     'discogstags'  "['rock', 'grunge']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  ''
                                            'date'  '1992'
                                        'comments'  ''
                                           'genre'  'rock-gr-grunge'
                                             'bpm'  '111.763'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Incesticide'
'TBPM' (BPM (beats per minute))                     '111.763'
'TCON' (Content type, a.k.a. Genre)                 'rock-gr-grunge'
'TDRC' (Recording time)                             '1992'
'TIT2' (Title/songname/content description)         'Son of a Gun'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Nirvana'
'TRCK' (Track number/Position in set)               '7'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'grunge']
'TXXX:lastfmtags'                                   ['alternative rock', '90s', 'alternative', 'grunge', 'rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.54 dB'
'TXXX:replaygain_track_peak'                        '0.594990'

========================== row from database ==========================
                                              'id'  1348220
                                            'path'  /data/Music/Bulk/00poprockelectronic/Nirvana/MBZ;#Nirvana;#Incesticide;#07;#Son of a Gun.mp3
                                         'working'  None
                                         'bitrate'  224
                                    'duration_sec'  168
                                           'genre'  rock-gr-grunge
                                        'filesize'  4713502
                                           'mtime'  1636902974
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic MBZ;#Nirvana;#Incesticide;#07;#Son rock gr grunge
                                      'tag_artist'  Nirvana
                                     'tag_release'  Incesticide
                                       'tag_title'  Son of a Gun
                                             'bpm'  111.763
                                    'search_title'  'a':3 'gun':4 'of':2 'son':1
                                   'search_artist'  'nirvana':1
                                  'search_release'  'incesticide':1
                                     'search_rest'  '00poprockelectronic':1 '07':5,10 'gr':13 'grunge':14 'incesticide':4,9 'mbz':2,7 'nirvana':3,8 'rock':12 'son':6,11
                                    'search_combo'  '00poprockelectronic':7 '07':11,16 'a':3A 'gr':19 'grunge':20 'gun':4A 'incesticide':6C,10,15 'mbz':8,13 'nirvana':5B,9,14 'of':2A 'rock':18 'son':1A,12,17
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  9B
                                           '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-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-2', 'q-bass-4', 'q-grit-3']
                                      'lastfmtags'  ['alternative rock', '90s', 'alternative', 'grunge', 'rock']
                                        'tag_date'  1992
                                     'discogstags'  ['rock', 'grunge']

============================== file details ==============================
                                           'mtime'  1636902974.0582032  (2021-11-14 16:16:14)
                             'size'  4713502