======================== unified (from filesystem) ========================
                                         'bitrate'  '237.429'
                                        'duration'  '325'
                                          'artist'  'Charley Patton'
                                     'text_people'  ''
                                         'release'  'The Blues'
                                           'title'  'Revenue Man Blues'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-3', 'Q-LOCALNESS-3', 'Q-HHRNBTT-1', 'Q-UNU-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['country blues', 'blues', 'delta blues', 'folk', 'classic blues']"
                                     'discogstags'  "['blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '12'
                                      'tracktotal'  ''
                                            'date'  '1960'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '112.321'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Blues'
'TBPM' (BPM (beats per minute))                     '112.321'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TDRC' (Recording time)                             '1960'
'TIT2' (Title/songname/content description)         'Revenue Man Blues'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Charley Patton'
'TRCK' (Track number/Position in set)               '12'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'blues'
'TXXX:lastfmtags'                                   ['country blues', 'blues', 'delta blues', 'folk', 'classic blues']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.03 dB'
'TXXX:replaygain_track_peak'                        '0.651680'

========================== row from database ==========================
                                              'id'  1294465
                                            'path'  /data/Music/Bulk/00poprockelectronic/The Blues/12 Revenue Man Blues.wma.mp3
                                         'working'  None
                                         'bitrate'  237
                                    'duration_sec'  325
                                           'genre'  prerock-jb-blues
                                        'filesize'  9653757
                                           'mtime'  1620403795
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 12 Blues.wma prerock jb blues
                                      'tag_artist'  Charley Patton
                                     'tag_release'  The Blues
                                       'tag_title'  Revenue Man Blues
                                             'bpm'  112.321
                                    'search_title'  'blues':3 'man':2 'revenue':1
                                   'search_artist'  'charley':1 'patton':2
                                  'search_release'  'blues':2 'the':1
                                     'search_rest'  '00poprockelectronic':1 'blues':2,7 'blueswma':4 'jb':6 'prerock':5 'wma':3
                                    'search_combo'  '00poprockelectronic':8 'blues':3A,7C,9,14 'blueswma':11 'charley':4B 'jb':13 'man':2A 'patton':5B 'prerock':12 'revenue':1A 'the':6C 'wma':10
                                    'tag_tracknum'  12
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-4', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['country blues', 'blues', 'delta blues', 'folk', 'classic blues']
                                        'tag_date'  1960
                                     'discogstags'  ['blues']

============================== file details ==============================
                                           'mtime'  1620403794.575911  (2021-05-07 18:09:54)
                             'size'  9653757