======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '323'
                                          'artist'  'Bass Kittens'
                                     'text_people'  ''
                                         'release'  'Darker Side Of Jazz'
                                           'title'  'Get A Grip'
                                           'quals'  ("['Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', 'Q-UNU-1', "
 "'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-3', 'q-other-1', 'q-piano-1', 'q-vocals-1', 'q-mixbeat-3']")
                                      'lastfmtags'  ("['elektro', 'nu electro', 'e l e c t r o', 'electro bass', 'electro', "
 "'electronic']")
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-dance'
                                             'bpm'  '110.003'
                                             'key'  '3B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Darker Side Of Jazz'
'TBPM' (BPM (beats per minute))                     '110.003'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-dance'
'TIT2' (Title/songname/content description)         'Get A Grip'
'TKEY' (Initial key)                                '3B'
'TPE1' (Lead performer(s)/Soloist(s))               'Bass Kittens'
'TRCK' (Track number/Position in set)               '5'
'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'                                   ['elektro',
 'nu electro',
 'e l e c t r o',
 'electro bass',
 'electro',
 'electronic']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-3.05 dB'
'TXXX:replaygain_track_peak'                        '0.954481'

========================== row from database ==========================
                                              'id'  1456470
                                            'path'  /data/Music/Bulk/00poprockelectronic-generic-dance-trapbeat/00mixable/Bass Kittens/05. Get A Grip.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  323
                                           'genre'  electronic-generic or radio-dance
                                        'filesize'  5170454
                                           'mtime'  1620558218
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic generic dance trapbeat 00mixable 05. electronic generic or radio dance
                                      'tag_artist'  Bass Kittens
                                     'tag_release'  Darker Side Of Jazz
                                       'tag_title'  Get A Grip
                                             'bpm'  110.003
                                    'search_title'  'a':2 'get':1 'grip':3
                                   'search_artist'  'bass':1 'kittens':2
                                  'search_release'  'darker':1 'jazz':4 'of':3 'side':2
                                     'search_rest'  '00mixable':5 '00poprockelectronic':1 '05':6,7 'dance':3 'electronic':8 'generic':2 'or':9 'radio':10 'trapbeat':4
                                    'search_combo'  '00mixable':14 '00poprockelectronic':10 '05':15,16 'a':2A 'bass':4B 'dance':12 'darker':6C 'electronic':17 'generic':11 'get':1A 'grip':3A 'jazz':9C 'kittens':5B 'of':8C 'or':18 'radio':19 'side':7C 'trapbeat':13
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  3B
                                           'quals'  ['Q-HHRNBTT-1', '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-3', 'q-syn-3', 'q-chart-3', 'q-other-1', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['elektro', 'nu electro', 'e l e c t r o', 'electro bass', 'electro', 'electronic']
                                        'tag_date'  
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1620558217.5979156  (2021-05-09 13:03:37)
                             'size'  5170454