======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '219'
                                          'artist'  'PSY'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Gangnam Style'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-LOCALNESS-1', "
 "'Q-HHRNBTT-2', 'Q-SYN-2', 'Q-BUSY-3', 'Q-GRIT-2', 'Q-PLAY-2', 'q-bass-3', "
 "'Q-CHART-2', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-3', "
 "'Q-MIXBEAT-2']")
                                      'lastfmtags'  "['k-pop', 'korean', 'pop', 'hip-hop', 'dance']"
                                     'discogstags'  "['classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '21'
                                      'tracktotal'  ''
                                            'date'  '2014'
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '132.1'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TBPM' (BPM (beats per minute))                     '132.1'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TDRC' (Recording time)                             '2014'
'TIT2' (Title/songname/content description)         'Gangnam Style'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'PSY'
'TRCK' (Track number/Position in set)               '21'
'TXXX:Q-BUSY'                                       '3'
'TXXX:Q-CHART'                                      '2'
'TXXX:Q-GRIT'                                       '2'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '2'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-MIXBEAT'                                    '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-SYN'                                        '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'classical'
'TXXX:lastfmtags'                                   ['k-pop', 'korean', 'pop', 'hip-hop', 'dance']
'TXXX:q-bass'                                       '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-7.69 dB'
'TXXX:replaygain_track_peak'                        '0.773857'

========================== row from database ==========================
                                              'id'  1482438
                                            'path'  /data/Music/Bulk/00poprockelectronic/21 - PSY - Gangnam Style.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  219
                                           'genre'  electronic-unsorted
                                        'filesize'  9462401
                                           'mtime'  1621696009
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 21 electronic unsorted
                                      'tag_artist'  PSY
                                     'tag_release'  None
                                       'tag_title'  Gangnam Style
                                             'bpm'  132.1
                                    'search_title'  'gangnam':1 'style':2
                                   'search_artist'  'psy':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 '21':2 'electronic':3 'unsorted':4
                                    'search_combo'  '00poprockelectronic':4 '21':5 'electronic':6 'gangnam':1A 'psy':3B 'style':2A 'unsorted':7
                                    'tag_tracknum'  21
                                      'num_images'  1
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'Q-MIXBEAT-2', 'Q-OLDST-3', 'Q-GRIT-2', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-CHART-2', 'q-drums-4', 'Q-SYN-2', 'q-other-1', 'Q-BUSY-3', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-3']
                                      'lastfmtags'  ['k-pop', 'korean', 'pop', 'hip-hop', 'dance']
                                        'tag_date'  2014
                                     'discogstags'  ['classical']

============================== file details ==============================
                                           'mtime'  1621696008.647476  (2021-05-22 17:06:48)
                             'size'  9462401