======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '365'
                                          'artist'  'Tujiko Noriko'
                                     'text_people'  ''
                                         'release'  'From Tokyo To Naiagara'
                                           'title'  'Mugen Kyuukou (Infinity Train)'
                                           'quals'  ("['Q-HAP-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-2', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['electronica', 'female vocalists', 'electronic', 'japanese', 'experimental']"
                                     'discogstags'  "['electronic', 'experimental']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  '8'
                                            'date'  '2003'
                                        'comments'  ''
                                           'genre'  'loc-asia-japan'
                                             'bpm'  '84.175'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            ' 000006A3 000000FD 00006420'
'COMM:iTunNORM:eng'                                 (' 000006A3 000000FD 00006420 0000358C 00025F8D 00032892 00007E50 000075A0 '
 '0004F492 0004F492')
'COMM:iTunes_CDDB_IDs:eng'                          '8+7C87B1D7C83A88DB22B47BB0620CFF3A+2873143'
'TALB' (Album/Movie/Show title)                     'From Tokyo To Naiagara'
'TBPM' (BPM (beats per minute))                     '84.175'
'TCON' (Content type, a.k.a. Genre)                 'loc-asia-japan'
'TDRC' (Recording time)                             '2003'
'TENC' (Encoded by)                                 'iTunes v4.0.1'
'TIT2' (Title/songname/content description)         'Mugen Kyuukou (Infinity Train)'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Tujiko Noriko'
'TRCK' (Track number/Position in set)               '4/8'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['electronic', 'experimental']
'TXXX:lastfmtags'                                   ['electronica', 'female vocalists', 'electronic', 'japanese', 'experimental']
'TXXX:q-bass'                                       '1'
'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'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.36 dB'
'TXXX:replaygain_track_peak'                        '0.492523'

========================== row from database ==========================
                                              'id'  933797
                                            'path'  /data/Music/Bulk/00localcharacter/00asia/Tujiko Noriko/From Tokyo To Naiagara/04 Mugen Kyuukou (Infinity Train).mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  365
                                           'genre'  loc-asia-japan
                                        'filesize'  7312322
                                           'mtime'  1637330161
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00asia 04 loc asia japan
                                      'tag_artist'  Tujiko Noriko
                                     'tag_release'  From Tokyo To Naiagara
                                       'tag_title'  Mugen Kyuukou (Infinity Train)
                                             'bpm'  84.175
                                    'search_title'  'infinity':3,4 'kyuukou':2 'mugen':1 'train':5,6
                                   'search_artist'  'noriko':2 'tujiko':1
                                  'search_release'  'from':1 'naiagara':4 'to':3 'tokyo':2
                                     'search_rest'  '00asia':1 'asia':3 'japan':4 'loc':2
                                    'search_combo'  '00asia':13 'asia':15 'from':9C 'infinity':3A,4A 'japan':16 'kyuukou':2A 'loc':14 'mugen':1A 'naiagara':12C 'noriko':8B 'to':11C 'tokyo':10C 'train':5A,6A 'tujiko':7B
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['electronica', 'female vocalists', 'electronic', 'japanese', 'experimental']
                                        'tag_date'  2003
                                     'discogstags'  ['electronic', 'experimental']

============================== file details ==============================
                                           'mtime'  1637330161.2234056  (2021-11-19 14:56:01)
                             'size'  7312322