======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '202'
                                          'artist'  'The Doors'
                                     'text_people'  ''
                                         'release'  'Waiting For The Sun'
                                           'title'  "Summer's Almost Gone"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'Q-PIANO-3', 'q-chart-4', 'q-drums-1', 'q-other-2', 'q-vocals-4', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['rock', 'psychedelic rock', '60s', 'psychedelic', 'classic rock']"
                                     'discogstags'  "['rock', 'blues rock', 'psychedelic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '1968'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '94.1'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Waiting For The Sun'
'TBPM' (BPM (beats per minute))                     '94.1'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDRC' (Recording time)                             '1968'
'TIT2' (Title/songname/content description)         "Summer's Almost Gone"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Doors'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'blues rock', 'psychedelic rock']
'TXXX:lastfmtags'                                   ['rock', 'psychedelic rock', '60s', 'psychedelic', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.49 dB'
'TXXX:replaygain_track_peak'                        '0.510548'

========================== row from database ==========================
                                              'id'  1415324
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/The Doors - 1968 - Waiting For The Sun/04 - Summers Almost Gone.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  202
                                           'genre'  rock-cppex-classic
                                        'filesize'  4855353
                                           'mtime'  1636038908
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy 1968 04 Summers rock cppex classic
                                      'tag_artist'  The Doors
                                     'tag_release'  Waiting For The Sun
                                       'tag_title'  Summer's Almost Gone
                                             'bpm'  94.1
                                    'search_title'  'almost':4 'gone':5 's':2 'summer':1 'summers':3
                                   'search_artist'  'doors':2 'the':1
                                  'search_release'  'for':2 'sun':4 'the':3 'waiting':1
                                     'search_rest'  '1968':2 'classic':6 'classicprogpsy':1 'cppex':5 'rock':4 'summers':3
                                    'search_combo'  '1968':13 'almost':4A 'classic':17 'classicprogpsy':12 'cppex':16 'doors':7B 'for':9C 'gone':5A 'rock':15 's':2A 'summer':1A 'summers':3A,14 'sun':11C 'the':6B,10C 'waiting':8C
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-mixbeat-2', 'Q-PIANO-3', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['rock', 'psychedelic rock', '60s', 'psychedelic', 'classic rock']
                                        'tag_date'  1968
                                     'discogstags'  ['rock', 'blues rock', 'psychedelic rock']

============================== file details ==============================
                                           'mtime'  1636038907.6390915  (2021-11-04 16:15:07)
                             'size'  4855353