======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '61'
                                          'artist'  'Tosca'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Listen My Friend'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['lounge', 'electronic', 'trip hop', 'downtempo', 'chillout']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-trip hop or downtempo or acid jazz'
                                             'bpm'  '84.7'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '84.7'
'TCON' (Content type, a.k.a. Genre)                 'electronic-trip hop or downtempo or acid jazz'
'TIT2' (Title/songname/content description)         'Listen My Friend'
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'Tosca'
'TXXX:Mp3gain_minmax'                               '159,190'
'TXXX:Mp3gain_undo'                                 '-003,-003,N'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['lounge', 'electronic', 'trip hop', 'downtempo', 'chillout']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.19 dB'
'TXXX:replaygain_track_peak'                        '0.451035'

========================== row from database ==========================
                                              'id'  1335356
                                            'path'  /data/Music/Bulk/00poprockelectronic/Tosca/09 - listen my friend.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  61
                                           'genre'  electronic-trip hop or downtempo or acid jazz
                                        'filesize'  982891
                                           'mtime'  1636911427
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 09 listen my friend electronic trip hop or downtempo or acid jazz
                                      'tag_artist'  Tosca
                                     'tag_release'  None
                                       'tag_title'  Listen My Friend
                                             'bpm'  84.7
                                    'search_title'  'friend':3 'listen':1 'my':2
                                   'search_artist'  'tosca':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'acid':10 'downtempo':9 'electronic':5 'friend':4 'hop':7 'jazz':11 'listen':2 'my':3 'or':8 'trip':6
                                    'search_combo'  '00poprockelectronic':5 'acid':14 'downtempo':13 'electronic':9 'friend':3A,8 'hop':11 'jazz':15 'listen':1A,6 'my':2A,7 'or':12 'tosca':4B 'trip':10
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['lounge', 'electronic', 'trip hop', 'downtempo', 'chillout']
                                        'tag_date'  
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1636911427.2095523  (2021-11-14 18:37:07)
                             'size'  982891