======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '336'
                                          'artist'  'Greg Lake'
                                     'text_people'  ''
                                         'release'  'King Biscuit Flower Hour:  Gre'
                                           'title'  'In The Court Of The Crimson Ki'
                                           'quals'  ("['Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['progressive rock', 'guitar', 'rock', 'classic rock', 'christmas']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'rock-unsorted'
                                             'bpm'  '143.213'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'King Biscuit Flower Hour:  Gre'
'TBPM' (BPM (beats per minute))                     '143.213'
'TCON' (Content type, a.k.a. Genre)                 'rock-unsorted'
'TIT2' (Title/songname/content description)         'In The Court Of The Crimson Ki'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Greg Lake'
'TRCK' (Track number/Position in set)               '10'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['progressive rock', 'guitar', 'rock', 'classic rock', 'christmas']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.05 dB'
'TXXX:replaygain_track_peak'                        '0.585136'

========================== row from database ==========================
                                              'id'  1420458
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Greg Lake/Greg Lake__King Biscuit Flower Hour_  Greg Lake__10 - In The Court Of The Crimson King.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  336
                                           'genre'  rock-unsorted
                                        'filesize'  5379796
                                           'mtime'  1620386370
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy Lake__King Hour_ Lake__10 rock unsorted
                                      'tag_artist'  Greg Lake
                                     'tag_release'  King Biscuit Flower Hour:  Gre
                                       'tag_title'  In The Court Of The Crimson Ki
                                             'bpm'  143.213
                                    'search_title'  'court':3 'crimson':5 'in':1 'ki':6 'of':4 'the':2
                                   'search_artist'  'greg':1 'lake':2
                                  'search_release'  'biscuit':2 'flower':3 'gre':6 'hour':4,5 'king':1
                                     'search_rest'  '10':6 'classicprogpsy':1 'hour':4 'king':3 'lake':2,5 'rock':7 'unsorted':8
                                    'search_combo'  '10':20 'biscuit':10C 'classicprogpsy':15 'court':3A 'crimson':5A 'flower':11C 'gre':14C 'greg':7B 'hour':12C,13C,18 'in':1A 'ki':6A 'king':9C,17 'lake':8B,16,19 'of':4A 'rock':21 'the':2A 'unsorted':22
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['progressive rock', 'guitar', 'rock', 'classic rock', 'christmas']
                                        'tag_date'  
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620386370.0566773  (2021-05-07 13:19:30)
                             'size'  5379796