======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '135'
                                          'artist'  '[unknown]'
                                     'text_people'  ''
                                         'release'  'Teppoudama No Bigaku -- The World Of Sadao Nakajima'
                                           'title'  "(Track 17 F. 'The World Of Sadao Nakajima' JA)"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-JZFKS-4', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '17'
                                      'tracktotal'  '23'
                                            'date'  '1976'
                                        'comments'  ''
                                           'genre'  'funk or soul-funk'
                                             'bpm'  '136.8'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'COMM:iTunNORM:eng'                                 (' 000027C8 00000062 00018527 00008B59 000083BC 0000E2F0 00008B0B 00008A58 '
 '0000FC24 0000D924')
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000B58 00000000005B5198 00000000 00000000 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '23+F46B65A9CC90E06A8A5971E6EFF5799A+6879018'
'TALB' (Album/Movie/Show title)                     'Teppoudama No Bigaku -- The World Of Sadao Nakajima'
'TBPM' (BPM (beats per minute))                     '136.8'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul-funk'
'TDRC' (Recording time)                             '1976'
'TENC' (Encoded by)                                 'iTunes v6.0.4'
'TIT2' (Title/songname/content description)         "(Track 17 F. 'The World Of Sadao Nakajima' JA)"
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               '[unknown]'
'TRCK' (Track number/Position in set)               '17/23'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '4'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-10.48 dB'
'TXXX:replaygain_track_peak'                        '1.135427'

========================== row from database ==========================
                                              'id'  1530388
                                            'path'  /data/Music/Bulk/00popandrock-swing-funk-soul/EASY Instr 70_s/• (Unk. Artist) - (Track 17 F. _The World Of Sadao Nakajima_ JA).mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  135
                                           'genre'  funk or soul-funk
                                        'filesize'  2717978
                                           'mtime'  1620665623
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock swing funk soul EASY Instr 70_s • (Unk. Artist) _The Nakajima_ funk soul funk
                                      'tag_artist'  [unknown]
                                     'tag_release'  Teppoudama No Bigaku -- The World Of Sadao Nakajima
                                       'tag_title'  (Track 17 F. 'The World Of Sadao Nakajima' JA)
                                             'bpm'  136.8
                                    'search_title'  'f':3,4 'ja':12,13 'nakajima':10,11 'of':8 'sadao':9 'the':5,6 'track':1,2 'world':7
                                   'search_artist'  'unknown':1,2
                                  'search_release'  'bigaku':3 'nakajima':8 'no':2 'of':6 'sadao':7 'teppoudama':1 'the':4 'world':5
                                     'search_rest'  '70':6 'artist':10,11 'easy':4 'funk':2 'instr':5 'nakajima':13 's':7 'soul':3 'swing':1 'the':12 'unk':8,9
                                    'search_combo'  '70':29 'artist':33,34 'bigaku':18C 'easy':27 'f':3A,4A 'funk':25 'instr':28 'ja':12A,13A 'nakajima':10A,11A,23C,36 'no':17C 'of':8A,21C 's':30 'sadao':9A,22C 'soul':26 'swing':24 'teppoudama':16C 'the':5A,6A,19C,35 'track':1A,2A 'unk':31,32 'unknown':14B,15B 'world':7A,20C
                                    'tag_tracknum'  17
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-4', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1976
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620665622.5458357  (2021-05-10 18:53:42)
                             'size'  2717978