======================== unified (from filesystem) ========================
                                         'bitrate'  '185.167'
                                        'duration'  '404'
                                          'artist'  'Deep Purple'
                                     'text_people'  ''
                                         'release'  'In Concert With The London Symphony Orchestra'
                                           'title'  'Smoke On The Water'
                                           'quals'  ("['Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['heavy metal', 'rock', 'hard rock', 'progressive rock', 'classic rock']"
                                     'discogstags'  "['prog rock', 'classic rock', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  '7'
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'rock-cppex-progressive;eid-metal;rock-cppex;set-pl-billboard'
                                             'bpm'  '119.688'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'In Concert With The London Symphony Orchestra'
'TBPM' (BPM (beats per minute))                     '119.688'
'TCON' (Content type, a.k.a. Genre)                 ['rock-cppex-progressive', 'eid-metal', 'rock-cppex', 'set-pl-billboard']
'TDRC' (Recording time)                             '1999'
'TIT2' (Title/songname/content description)         'Smoke On The Water'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Deep Purple'
'TPOS' (Part of a set)                              '2/2'
'TRCK' (Track number/Position in set)               '7/7'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['prog rock', 'classic rock', 'rock']
'TXXX:iTunes_CDDB_IDs'                              '7+496EE9ADC8FE5583AA10605E9D7BE78B+638635'
'TXXX:lastfmtags'                                   ['heavy metal', 'rock', 'hard rock', 'progressive rock', 'classic rock']
'TXXX:q-bass'                                       '4'
'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'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.62 dB'
'TXXX:replaygain_track_peak'                        '0.445577'
'TXXX:tempo'                                        '00000 BPM'

========================== row from database ==========================
                                              'id'  1320352
                                            'path'  /data/Music/Bulk/00poprockelectronic/Deep Purple/In Concert with the London Symphony Orch/2-07 Smoke On The Water.mp3
                                         'working'  None
                                         'bitrate'  185
                                    'duration_sec'  404
                                           'genre'  rock-cppex-progressive;eid-metal;rock-cppex;set-pl-billboard
                                        'filesize'  9383522
                                           'mtime'  1636038754
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic with the 2 07 rock cppex progressive;eid metal;rock cppex;set billboard
                                      'tag_artist'  Deep Purple
                                     'tag_release'  In Concert With The London Symphony Orchestra
                                       'tag_title'  Smoke On The Water
                                             'bpm'  119.688
                                    'search_title'  'on':2 'smoke':1 'the':3 'water':4
                                   'search_artist'  'deep':1 'purple':2
                                  'search_release'  'concert':2 'in':1 'london':5 'orchestra':7 'symphony':6 'the':4 'with':3
                                     'search_rest'  '00poprockelectronic':1 '2':4 'billboard':19 'cppex':6,15,17 'eid':8,10 'metal':11,13 'progressive':7,9 'rock':5,12,14 'set':16,18 'the':3 'with':2
                                    'search_combo'  '00poprockelectronic':14 '2':17 'billboard':32 'concert':8C 'cppex':19,28,30 'deep':5B 'eid':21,23 'in':7C 'london':11C 'metal':24,26 'on':2A 'orchestra':13C 'progressive':20,22 'purple':6B 'rock':18,25,27 'set':29,31 'smoke':1A 'symphony':12C 'the':3A,10C,16 'water':4A 'with':9C,15
                                    'tag_tracknum'  7
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', '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-1', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['heavy metal', 'rock', 'hard rock', 'progressive rock', 'classic rock']
                                        'tag_date'  1999
                                     'discogstags'  ['prog rock', 'classic rock', 'rock']

============================== file details ==============================
                                           'mtime'  1636038754.114009  (2021-11-04 16:12:34)
                             'size'  9383522