======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '266'
                                          'artist'  'Evanescence'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'My Immortal (\x7f)'
                                           'quals'  ("['Q-HAP-2', 'Q-OLDST-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-4', 'q-play-3', "
 "'q-chart-3', 'q-drums-1', 'q-other-1', 'q-vocals-4', 'q-mixbeat-1', "
 "'Q-PIANO-3']")
                                      'lastfmtags'  "['gothic', 'gothic rock', 'female vocalists', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2008'
                                        'comments'  ''
                                           'genre'  'eid-unsorted'
                                             'bpm'  '140.335'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '140.335'
'TCON' (Content type, a.k.a. Genre)                 'eid-unsorted'
'TDRC' (Recording time)                             '2008'
'TIT2' (Title/songname/content description)         'My Immortal (\x7f)'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'Evanescence'
'TPE2' (Band/orchestra/accompaniment)               'Evanescence'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['gothic', 'gothic rock', 'female vocalists', 'rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+3.60 dB'
'TXXX:replaygain_track_peak'                        '0.304979'

========================== row from database ==========================
                                              'id'  1328668
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/Evanescence - My Immortal (굿) [].mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  266
                                           'genre'  eid-unsorted
                                        'filesize'  6396956
                                           'mtime'  1636910214
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] (굿) [] eid unsorted
                                      'tag_artist'  Evanescence
                                     'tag_release'  None
                                       'tag_title'  My Immortal ()
                                             'bpm'  140.335
                                    'search_title'  'immortal':2 'my':1
                                   'search_artist'  'evanescence':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'eid':11 'files':5,6 'loose':3,4 'unsorted':2 '굿':7,8,9,10
                                    'search_combo'  '00poprockelectronic':4 'eid':14 'evanescence':3B 'files':8,9 'immortal':2A 'loose':6,7 'my':1A 'unsorted':5 '굿':10,11,12,13
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-3', 'q-other-1', 'Q-HAP-2', 'q-bass-1', 'q-grit-4']
                                      'lastfmtags'  ['gothic', 'gothic rock', 'female vocalists', 'rock']
                                        'tag_date'  2008
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636910213.7359948  (2021-11-14 18:16:53)
                             'size'  6396956