======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '270'
                                          'artist'  'The Chemical Brothers'
                                     'text_people'  ''
                                         'release'  'Surrender'
                                           'title'  'Surrender'
                                           'quals'  ("['Q-HAP-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['dance', 'electronica', 'techno', 'electronic', 'big beat']"
                                     'discogstags'  "['electronic', 'tech house', 'big beat']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  ''
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-bigbeat'
                                             'bpm'  '84.596'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Surrender'
'TBPM' (BPM (beats per minute))                     '84.596'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-bigbeat'
'TDRC' (Recording time)                             '1999'
'TIT2' (Title/songname/content description)         'Surrender'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Chemical Brothers'
'TRCK' (Track number/Position in set)               '10'
'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'                                  ['electronic', 'tech house', 'big beat']
'TXXX:lastfmtags'                                   ['dance', 'electronica', 'techno', 'electronic', 'big beat']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.02 dB'
'TXXX:replaygain_track_peak'                        '0.411535'

========================== row from database ==========================
                                              'id'  1402852
                                            'path'  /data/Music/Bulk/00poprockelectronic-generic-dance-trapbeat/The Chemical Brothers/Surrender/MBZ;#The Chemical Brothers;#Surrender;#10;#Surrender.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  270
                                           'genre'  electronic-generic or radio-bigbeat
                                        'filesize'  5402104
                                           'mtime'  1621695901
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic generic dance trapbeat MBZ;#The Brothers;#Surrender;#10;#Surrender electronic generic or radio bigbeat
                                      'tag_artist'  The Chemical Brothers
                                     'tag_release'  Surrender
                                       'tag_title'  Surrender
                                             'bpm'  84.596
                                    'search_title'  'surrender':1
                                   'search_artist'  'brothers':3 'chemical':2 'the':1
                                  'search_release'  'surrender':1
                                     'search_rest'  '00poprockelectronic':1 '10':11,15 'bigbeat':20 'brothers':9,13 'dance':3 'electronic':17 'generic':2 'mbz':5,7 'or':18 'radio':19 'surrender':10,12,14,16 'the':6,8 'trapbeat':4
                                    'search_combo'  '00poprockelectronic':6 '10':16,20 'bigbeat':25 'brothers':4B,14,18 'chemical':3B 'dance':8 'electronic':22 'generic':7 'mbz':10,12 'or':23 'radio':24 'surrender':1A,5C,15,17,19,21 'the':2B,11,13 'trapbeat':9
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-3', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['dance', 'electronica', 'techno', 'electronic', 'big beat']
                                        'tag_date'  1999
                                     'discogstags'  ['electronic', 'tech house', 'big beat']

============================== file details ==============================
                                           'mtime'  1621695900.7946336  (2021-05-22 17:05:00)
                             'size'  5402104