======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '160'
                                          'artist'  'The Who'
                                     'text_people'  ''
                                         'release'  'The Ultimate Collection - Disk 1'
                                           'title'  "I'm Free"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-2', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['hard rock', 'rock', '60s', 'british', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  ''
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '112.696'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Ultimate Collection - Disk 1'
'TBPM' (BPM (beats per minute))                     '112.696'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         "I'm Free"
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Who'
'TRCK' (Track number/Position in set)               '15'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['hard rock', 'rock', '60s', 'british', 'classic rock']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.44 dB'
'TXXX:replaygain_track_peak'                        '0.410392'

========================== row from database ==========================
                                              'id'  1502375
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/The Who/The Ultimate Collection/15 - I_m Free.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  160
                                           'genre'  rock-cppex-classic
                                        'filesize'  3849086
                                           'mtime'  1636038985
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy 15 I_m rock cppex classic
                                      'tag_artist'  The Who
                                     'tag_release'  The Ultimate Collection - Disk 1
                                       'tag_title'  I'm Free
                                             'bpm'  112.696
                                    'search_title'  'free':4 'i':1 'im':3 'm':2
                                   'search_artist'  'the':1 'who':2
                                  'search_release'  '1':5 'collection':3 'disk':4 'the':1 'ultimate':2
                                     'search_rest'  'classic':6 'classicprogpsy':1 'cppex':5 'i':2 'm':3 'rock':4
                                    'search_combo'  '1':11C 'classic':17 'classicprogpsy':12 'collection':9C 'cppex':16 'disk':10C 'free':4A 'i':1A,13 'im':3A 'm':2A,14 'rock':15 'the':5B,7C 'ultimate':8C 'who':6B
                                    'tag_tracknum'  15
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['hard rock', 'rock', '60s', 'british', 'classic rock']
                                        'tag_date'  2002
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636038984.6456573  (2021-11-04 16:16:24)
                             'size'  3849086