======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '208'
                                          'artist'  "Salt 'n' Pepa"
                                     'text_people'  ''
                                         'release'  'The Greatest Hits'
                                           'title'  'Push It'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-3', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['hip-hop', 'rap', '80s', 'female vocalists', 'hip hop']"
                                     'discogstags'  "['hip hop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '1988'
                                        'comments'  ''
                                           'genre'  'hip hop or rnb or rap or turntablism'
                                             'bpm'  '126.965'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Greatest Hits'
'TBPM' (BPM (beats per minute))                     '126.965'
'TCON' (Content type, a.k.a. Genre)                 'hip hop or rnb or rap or turntablism'
'TDRC' (Recording time)                             '1988'
'TIT2' (Title/songname/content description)         'Push It'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               "Salt 'n' Pepa"
'TRCK' (Track number/Position in set)               '1'
'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'                                  'hip hop'
'TXXX:lastfmtags'                                   ['hip-hop', 'rap', '80s', 'female vocalists', 'hip hop']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'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'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+2.14 dB'
'TXXX:replaygain_track_peak'                        '0.453319'

========================== row from database ==========================
                                              'id'  1330220
                                            'path'  /data/Music/Bulk/00poprockelectronic/Salt N Pepa/MBZ;#Salt-N-Pepa;#The Greatest Hits;#01;#Push It.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  208
                                           'genre'  hip hop or rnb or rap or turntablism
                                        'filesize'  4994565
                                           'mtime'  1620571946
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic N MBZ;#Salt N Pepa;#The Hits;#01;#Push hip hop or rnb or rap or turntablism
                                      'tag_artist'  Salt 'n' Pepa
                                     'tag_release'  The Greatest Hits
                                       'tag_title'  Push It
                                             'bpm'  126.965
                                    'search_title'  'it':2 'push':1
                                   'search_artist'  'n':2,3 'pepa':4 'salt':1
                                  'search_release'  'greatest':2 'hits':3 'the':1
                                     'search_rest'  '00poprockelectronic':1 '01':12,15 'hip':17 'hits':11,14 'hop':18 'mbz':3,5 'n':2 'or':19 'pepa':7,9 'push':13,16 'rap':21 'rnb':20 'salt':4,6 'the':8,10 'turntablism':22
                                    'search_combo'  '00poprockelectronic':10 '01':21,24 'greatest':8C 'hip':26 'hits':9C,20,23 'hop':27 'it':2A 'mbz':12,14 'n':4B,5B,11 'or':28 'pepa':6B,16,18 'push':1A,22,25 'rap':30 'rnb':29 'salt':3B,13,15 'the':7C,17,19 'turntablism':31
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-3', 'q-vocals-3', '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-2', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['hip-hop', 'rap', '80s', 'female vocalists', 'hip hop']
                                        'tag_date'  1988
                                     'discogstags'  ['hip hop']

============================== file details ==============================
                                           'mtime'  1620571946.3875742  (2021-05-09 16:52:26)
                             'size'  4994565