======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '377'
                                          'artist'  'Fantastic Plastic Machine'
                                     'text_people'  ''
                                         'release'  'beautiful.'
                                           'title'  'On a Chair'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-HHRNBTT-1', 'Q-UNU-1', 'Q-LOCALNESS-2', "
 "'Q-OLDST-4', 'Q-PLAY-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', "
 "'Q-PIANO-2', 'q-chart-2', 'q-drums-4', 'q-other-2', 'q-vocals-2', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['lounge', 'shibuya kei', 'electronica', 'electronic', 'japanese']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  '13'
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  'loc-asia-japan;set-pl-sced;prerock-jb-jazz-lounge or exotica or bossa'
                                             'bpm'  '98'
                                             'key'  '2B'
                                        'acoustid'  'b45e4af9-55df-410b-bdd5-b89d1c91345d'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 000004EA 000005C0 00002CC5'
'COMM:iTunNORM:eng'                                 (' 000004EA 000005C0 00002CC5 00003D64 0001119E 0001119E 000064E5 0000665D '
 '0002E65E 0002712E')
'TALB' (Album/Movie/Show title)                     'beautiful.'
'TBPM' (BPM (beats per minute))                     '98'
'TCON' (Content type, a.k.a. Genre)                 ['loc-asia-japan', 'set-pl-sced', 'prerock-jb-jazz-lounge or exotica or bossa']
'TDOR' (Original release time)                      '2001'
'TDRC' (Recording time)                             '2001-05-15'
'TIPL' (Involved people list)                       TIPL(encoding=<Encoding.UTF16: 1>, people=[['producer', 'Tomoyuki Tanaka'], ['engineer', 'Akitsugu Doi'], ['engineer', 'Tetsushi Mase'], ['engineer', 'Bruce Miller'], ['engineer', 'Taketoshi Nakauchi'], ['engineer', 'Yoshiaki Ōnishi'], ['engineer', 'Hiroyuki Sanada'], ['engineer', 'Hitoshi Satou'], ['engineer', 'Masahiro Shimbo'], ['engineer', 'Art Skye'], ['engineer', 'Shinichi Tokumo'], ['mix', 'Yoshiaki Ōnishi'], ['', 'Dan Miyakawa']])
'TIT2' (Title/songname/content description)         'On a Chair'
'TKEY' (Initial key)                                '2B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Fantastic Plastic Machine'
'TPE2' (Band/orchestra/accompaniment)               'Fantastic Plastic Machine'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Emperor Norton'
'TRCK' (Track number/Position in set)               '5/13'
'TSO2'                                              'Fantastic Plastic Machine'
'TSOP' (Performer sort order)                       'Fantastic Plastic Machine'
'TXXX:ASIN'                                         'B00005AQKL'
'TXXX:Acoustid Id'                                  'b45e4af9-55df-410b-bdd5-b89d1c91345d'
'TXXX:Artists'                                      'Fantastic Plastic Machine'
'TXXX:BARCODE'                                      '607217704228'
'TXXX:CATALOGNUMBER'                                'EMN 7042'
'TXXX:MusicBrainz Album Artist Id'                  '30b39f11-2f7b-482c-b3b2-21fd5d30b556'
'TXXX:MusicBrainz Album Id'                         '34553567-4ed6-4704-b29e-9455981de342'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '30b39f11-2f7b-482c-b3b2-21fd5d30b556'
'TXXX:MusicBrainz Release Group Id'                 'a0f7f13e-9c9f-3683-9d40-7219ba26fd89'
'TXXX:MusicBrainz Release Track Id'                 'c9e9a9cf-3416-371d-ba68-8d66cb22c614'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '4'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['lounge', 'shibuya kei', 'electronica', 'electronic', 'japanese']
'TXXX:originalyear'                                 '2001'
'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'                                      '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.25 dB'
'TXXX:replaygain_track_peak'                        '0.533290'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'c629284d-1186-4552-a915-78e52ed7e129')
'WXXX:'                                             WXXX(encoding=<Encoding.LATIN1: 0>, desc='', url='http://www.allmusic.com/cg/amg.dll?p=amg&token=adfeaee47d1cdf4aad7420c093317bcebc7ce11d8c16da971f28455a92b63e45911c61e44ee195ceaef874ab7bafff28e85d05d2c3e454f9cc1740&sql=10:14420rjai48b')

========================== row from database ==========================
                                              'id'  444756
                                            'path'  /data/Music/Bulk/00localcharacter/Fantastic Plastic Machine/[2001] Beautiful/05 On A Chair.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  377
                                           'genre'  loc-asia-japan;set-pl-sced;prerock-jb-jazz-lounge or exotica or bossa
                                        'filesize'  9131612
                                           'mtime'  1620540483
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter [2001] Beautiful 05 A loc asia japan;set pl sced;prerock jb jazz lounge or exotica or bossa
                                      'tag_artist'  Fantastic Plastic Machine
                                     'tag_release'  beautiful.
                                       'tag_title'  On a Chair
                                             'bpm'  98.0
                                    'search_title'  'a':2 'chair':3 'on':1
                                   'search_artist'  'fantastic':1 'machine':3 'plastic':2
                                  'search_release'  'beautiful':1,2
                                     'search_rest'  '2001':1,2 'a':4 'asia':6 'beautiful':3 'bossa':21 'exotica':20 'japan':7,9 'jazz':17 'jb':16 'loc':5 'lounge':18 'or':19 'pl':11 'prerock':13,15 'sced':12,14 'set':8,10
                                    'search_combo'  '2001':9,10 'a':2A,12 'asia':14 'beautiful':7C,8C,11 'bossa':29 'chair':3A 'exotica':28 'fantastic':4B 'japan':15,17 'jazz':25 'jb':24 'loc':13 'lounge':26 'machine':6B 'on':1A 'or':27 'pl':19 'plastic':5B 'prerock':21,23 'sced':20,22 'set':16,18
                                    'tag_tracknum'  5
                                      'num_images'  1
                                             'key'  2B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-2', 'q-mixbeat-2', 'Q-PIANO-2', 'Q-OLDST-4', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['lounge', 'shibuya kei', 'electronica', 'electronic', 'japanese']
                                        'tag_date'  2001
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620540482.841984  (2021-05-09 08:08:02)
                             'size'  9131612