======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '286'
                                          'artist'  'Alice in Chains'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Man in the Box'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-1', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['alternative rock', 'alternative', 'hard rock', 'grunge', 'rock']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'rock-gr-hard'
                                             'bpm'  '141.611'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '141.611'
'TCON' (Content type, a.k.a. Genre)                 'rock-gr-hard'
'TIT2' (Title/songname/content description)         'Man in the Box'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Alice in Chains'
'TXXX:Q-HAP'                                        '2'
'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'                                   ['alternative rock', 'alternative', 'hard rock', 'grunge', 'rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.02 dB'
'TXXX:replaygain_track_peak'                        '0.505832'

========================== row from database ==========================
                                              'id'  1336353
                                            'path'  /data/Music/Bulk/00dwimp/Alice in Chains/Dirt/Alice In Chains - Man In the Box.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  286
                                           'genre'  rock-gr-hard
                                        'filesize'  4587939
                                           'mtime'  1636902784
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp Dirt In In rock gr hard
                                      'tag_artist'  Alice in Chains
                                     'tag_release'  None
                                       'tag_title'  Man in the Box
                                             'bpm'  141.611
                                    'search_title'  'box':4 'in':2 'man':1 'the':3
                                   'search_artist'  'alice':1 'chains':3 'in':2
                                  'search_release'  
                                     'search_rest'  '00dwimp':1 'dirt':2 'gr':5 'hard':6 'in':3 'rock':4
                                    'search_combo'  '00dwimp':8 'alice':5B 'box':4A 'chains':7B 'dirt':9 'gr':12 'hard':13 'in':2A,6B,10 'man':1A 'rock':11 'the':3A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['alternative rock', 'alternative', 'hard rock', 'grunge', 'rock']
                                        'tag_date'  
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1636902784.0347056  (2021-11-14 16:13:04)
                             'size'  4587939