======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '279'
                                          'artist'  'URBVN'
                                     'text_people'  ''
                                         'release'  'Electronic Gems'
                                           'title'  'I Sat With U (Magi System & 憂鬱 Remix)'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-1', 'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['synthpop', 'lo-fi', 'chillwave']"
                                     'discogstags'  "['electronic', 'synthwave']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2015'
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '89.9'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Electronic Gems'
'TBPM' (BPM (beats per minute))                     '89.9'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TDRC' (Recording time)                             '2015'
'TIT2' (Title/songname/content description)         'I Sat With U (Magi System & 憂鬱 Remix)'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'URBVN'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf56.40.101'
'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', 'synthwave']
'TXXX:lastfmtags'                                   ['synthpop', 'lo-fi', 'chillwave']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.06 dB'
'TXXX:replaygain_track_peak'                        '0.499904'

========================== row from database ==========================
                                              'id'  1360551
                                            'path'  /data/Music/Bulk/00poprockelectronic/Electronic Gems/URBVN - I Sat With U (Magi System & 憂鬱 Remix).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  279
                                           'genre'  electronic-unsorted
                                        'filesize'  4476778
                                           'mtime'  1622756993
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic electronic unsorted
                                      'tag_artist'  URBVN
                                     'tag_release'  Electronic Gems
                                       'tag_title'  I Sat With U (Magi System & 憂鬱 Remix)
                                             'bpm'  89.9
                                    'search_title'  'i':1 'magi':5,6 'remix':9,10 'sat':2 'system':7 'u':4 'with':3 '憂鬱':8
                                   'search_artist'  'urbvn':1
                                  'search_release'  'electronic':1 'gems':2
                                     'search_rest'  '00poprockelectronic':1 'electronic':2 'unsorted':3
                                    'search_combo'  '00poprockelectronic':14 'electronic':12C,15 'gems':13C 'i':1A 'magi':5A,6A 'remix':9A,10A 'sat':2A 'system':7A 'u':4A 'unsorted':16 'urbvn':11B 'with':3A '憂鬱':8A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['synthpop', 'lo-fi', 'chillwave']
                                        'tag_date'  2015
                                     'discogstags'  ['electronic', 'synthwave']

============================== file details ==============================
                                           'mtime'  1622756992.6607232  (2021-06-03 23:49:52)
                             'size'  4476778