======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '234'
                                          'artist'  'Head First'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Kittkat'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', "
 "'Q-HHRNBTT-3', 'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['breakbeat', 'breaks', 'electronic', 'oldskool haardcore', 'big beat']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '03'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'hip hop or rnb or rap or turntablism'
                                             'bpm'  '127.124'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '127.124'
'TCON' (Content type, a.k.a. Genre)                 'hip hop or rnb or rap or turntablism'
'TIT2' (Title/songname/content description)         'Kittkat'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Head First'
'TRCK' (Track number/Position in set)               '03'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '3'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['breakbeat', 'breaks', 'electronic', 'oldskool haardcore', 'big beat']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.93 dB'
'TXXX:replaygain_track_peak'                        '0.609163'

========================== row from database ==========================
                                              'id'  1359500
                                            'path'  /data/Music/Bulk/00poprockelectronic/Head First/To Da Bone/Head First - Kittkat - 03.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  234
                                           'genre'  hip hop or rnb or rap or turntablism
                                        'filesize'  3747840
                                           'mtime'  1620569706
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic To Da Bone 03 hip hop or rnb or rap or turntablism
                                      'tag_artist'  Head First
                                     'tag_release'  None
                                       'tag_title'  Kittkat
                                             'bpm'  127.124
                                    'search_title'  'kittkat':1
                                   'search_artist'  'first':2 'head':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'bone':4 'da':3 'hip':5 'hop':6 'or':7 'rap':9 'rnb':8 'to':2 'turntablism':10
                                    'search_combo'  '00poprockelectronic':4 'bone':7 'da':6 'first':3B 'head':2B 'hip':8 'hop':9 'kittkat':1A 'or':10 'rap':12 'rnb':11 'to':5 'turntablism':13
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-3', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['breakbeat', 'breaks', 'electronic', 'oldskool haardcore', 'big beat']
                                        'tag_date'  
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1620569706.2442155  (2021-05-09 16:15:06)
                             'size'  3747840