======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '112'
                                          'artist'  'Nullsleep'
                                     'text_people'  ''
                                         'release'  'hello world'
                                           'title'  'polygon glider'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-4', 'q-bass-3', 'q-busy-3', 'q-grit-1', 'q-play-3', "
 "'q-chart-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['8bitpeoples', '8 bit', 'chiptune', '8bit', 'electronic']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  'electronic-we-beeps or chip or pico'
                                             'bpm'  '119.900'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'hello world'
'TBPM' (BPM (beats per minute))                     '119.900'
'TCON' (Content type, a.k.a. Genre)                 'electronic-we-beeps or chip or pico'
'TDRC' (Recording time)                             '2001'
'TFLT' (File type)                                  'MPG/3'
'TIT2' (Title/songname/content description)         'polygon glider'
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '253733'
'TPE1' (Lead performer(s)/Soloist(s))               'Nullsleep'
'TRCK' (Track number/Position in set)               '2'
'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'
'TXXX:lastfmtags'                                   ['8bitpeoples', '8 bit', 'chiptune', '8bit', 'electronic']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '4'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.09 dB'
'TXXX:replaygain_track_peak'                        '0.475050'
'UFID:mailto:webmaster@mp3.com'                     UFID(owner='mailto:webmaster@mp3.com', data=b'673667')
'USER:eng'                                          ('Copyright notice. All material on MP3.com are protected by copyright law and '
 'by international treaties. You may download this material and make a '
 'reasonable number of copies of this material only for your own personal use. '
 'You may not otherwise reproduce, distribute, publicly perform, publicly '
 'display, or create derivative works of this material, unless authorized by '
 'the appropriate copyright owner(s).')
'USLT:Lyrics:eng'                                   'click bleep click'

========================== row from database ==========================
                                              'id'  131563
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Nullsleep/02-8bp017-nullsleep-polygon_glider.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  112
                                           'genre'  electronic-we-beeps or chip or pico
                                        'filesize'  1795064
                                           'mtime'  1621705461
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm 02 8bp017 nullsleep polygon_glider electronic we beeps chip pico
                                      'tag_artist'  Nullsleep
                                     'tag_release'  hello world
                                       'tag_title'  polygon glider
                                             'bpm'  119.9
                                    'search_title'  'glider':2 'polygon':1
                                   'search_artist'  'nullsleep':1
                                  'search_release'  'hello':1 'world':2
                                     'search_rest'  '8bp017':1 'beeps':7 'chip':8 'electronic':5 'glider':4 'nullsleep':2 'pico':9 'polygon':3 'we':6
                                    'search_combo'  '8bp017':6 'beeps':12 'chip':13 'electronic':10 'glider':2A,9 'hello':4C 'nullsleep':3B,7 'pico':14 'polygon':1A,8 'we':11 'world':5C
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-4', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['8bitpeoples', '8 bit', 'chiptune', '8bit', 'electronic']
                                        'tag_date'  2001
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1621705461.0737553  (2021-05-22 19:44:21)
                             'size'  1795064