======================== unified (from filesystem) ========================
                                         'bitrate'  '145.822'
                                        'duration'  '220'
                                          'artist'  'B.B. King'
                                     'text_people'  ''
                                         'release'  'Play Me the Blues (disc 3)'
                                           'title'  'Outside Help (short version)'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['guitar', 'blues rock', 'blues', 'jazz', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-jb-unsorted'
                                             'bpm'  '131.328'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Play Me the Blues (disc 3)'
'TBPM' (BPM (beats per minute))                     '131.328'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-unsorted'
'TIT2' (Title/songname/content description)         'Outside Help (short version)'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'B.B. King'
'TRCK' (Track number/Position in set)               '13'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['guitar', 'blues rock', 'blues', 'jazz', 'classic rock']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.70 dB'
'TXXX:replaygain_track_peak'                        '0.515109'

========================== row from database ==========================
                                              'id'  678160
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/B. B. King/MBZ;#B.B. King;#Play Me the Blues (disc 3);#13;#Outside Help (short version).mp3
                                         'working'  None
                                         'bitrate'  145
                                    'duration_sec'  220
                                           'genre'  prerock-jb-unsorted
                                        'filesize'  4014035
                                           'mtime'  1620528185
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country MBZ;#B.B. King;#Play 3);#13;#Outside prerock jb unsorted
                                      'tag_artist'  B.B. King
                                     'tag_release'  Play Me the Blues (disc 3)
                                       'tag_title'  Outside Help (short version)
                                             'bpm'  131.328
                                    'search_title'  'help':2 'outside':1 'short':3,4 'version':5,6
                                   'search_artist'  'b':1,2 'bb':3 'king':4
                                  'search_release'  '3':7,8 'blues':4 'disc':5,6 'me':2 'play':1 'the':3
                                     'search_rest'  '13':15,18 '3':14,17 'b':6,7 'bb':9 'country':4 'exotica':2 'jazz':1 'jb':21 'king':10,12 'mbz':5,8 'oldies':3 'outside':16,19 'play':11,13 'prerock':20 'unsorted':22
                                    'search_combo'  '13':33,36 '3':17C,18C,32,35 'b':7B,8B,24,25 'bb':9B,27 'blues':14C 'country':22 'disc':15C,16C 'exotica':20 'help':2A 'jazz':19 'jb':39 'king':10B,28,30 'mbz':23,26 'me':12C 'oldies':21 'outside':1A,34,37 'play':11C,29,31 'prerock':38 'short':3A,4A 'the':13C 'unsorted':40 'version':5A,6A
                                    'tag_tracknum'  13
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-1', 'q-chart-3', 'q-other-2', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['guitar', 'blues rock', 'blues', 'jazz', 'classic rock']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528185.1204479  (2021-05-09 04:43:05)
                             'size'  4014035