======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '240'
                                          'artist'  'Takeo Toyama'
                                     'text_people'  ''
                                         'release'  'Hello 88'
                                           'title'  'hello nancy'
                                           'quals'  ("['Q-HAP-3', 'Q-HHRNBTT-1', 'Q-UNU-1', 'Q-LOCALNESS-2', 'Q-JZFKS-2', "
 "'Q-OLDST-4', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-vocals-1', 'q-mixbeat-1', "
 "'Q-PIANO-3']")
                                      'lastfmtags'  "['electronica', 'workworkwork', 'jazz', 'japanese', 'experimental']"
                                     'discogstags'  "['pop', 'ballad', 'abstract', 'modern classical', 'experimental']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  ''
                                            'date'  '2003'
                                        'comments'  ''
                                           'genre'  'loc-asia-japan;prerock-jb-jazz-unsorted;electronic-unsorted'
                                             'bpm'  '103.1'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:iTunNORM:eng'                                 (' 000002E9 00000317 00000DB0 00000EA1 000138C5 000138AE 00004CB1 00004203 '
 '000138AE 0000EAA5')
'TALB' (Album/Movie/Show title)                     'Hello 88'
'TBPM' (BPM (beats per minute))                     '103.1'
'TCON' (Content type, a.k.a. Genre)                 ['loc-asia-japan', 'prerock-jb-jazz-unsorted', 'electronic-unsorted']
'TDRC' (Recording time)                             '2003'
'TIT2' (Title/songname/content description)         'hello nancy'
'TKEY' (Initial key)                                '5A'
'TPE1' (Lead performer(s)/Soloist(s))               'Takeo Toyama'
'TPE2' (Band/orchestra/accompaniment)               'Takeo Toyama'
'TRCK' (Track number/Position in set)               '7'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '4'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['pop', 'ballad', 'abstract', 'modern classical', 'experimental']
'TXXX:lastfmtags'                                   ['electronica', 'workworkwork', 'jazz', 'japanese', 'experimental']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.84 dB'
'TXXX:replaygain_track_peak'                        '0.790489'

========================== row from database ==========================
                                              'id'  399767
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Takeo Toyama/[2003] Hello 88/07 hello nancy.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  240
                                           'genre'  loc-asia-japan;prerock-jb-jazz-unsorted;electronic-unsorted
                                        'filesize'  5793085
                                           'mtime'  1620539098
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm [2003] 07 loc asia japan;prerock jb jazz unsorted;electronic unsorted
                                      'tag_artist'  Takeo Toyama
                                     'tag_release'  Hello 88
                                       'tag_title'  hello nancy
                                             'bpm'  103.1
                                    'search_title'  'hello':1 'nancy':2
                                   'search_artist'  'takeo':1 'toyama':2
                                  'search_release'  '88':2 'hello':1
                                     'search_rest'  '2003':1,2 'asia':4 'electronic':12,14 'japan':5,7 'jazz':10 'jb':9 'loc':3 'prerock':6,8 'unsorted':11,13,15
                                    'search_combo'  '2003':7,8 '88':6C 'asia':10 'electronic':18,20 'hello':1A,5C 'japan':11,13 'jazz':16 'jb':15 'loc':9 'nancy':2A 'prerock':12,14 'takeo':3B 'toyama':4B 'unsorted':17,19,21
                                    'tag_tracknum'  7
                                      'num_images'  1
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-mixbeat-1', 'Q-PIANO-3', 'q-play-2', 'Q-OLDST-4', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['electronica', 'workworkwork', 'jazz', 'japanese', 'experimental']
                                        'tag_date'  2003
                                     'discogstags'  ['pop', 'ballad', 'abstract', 'modern classical', 'experimental']

============================== file details ==============================
                                           'mtime'  1620539097.7115982  (2021-05-09 07:44:57)
                             'size'  5793085