======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '762'
                                          'artist'  'Koyama Michie'
                                     'text_people'  'Lizst, Franz'
                                         'release'  'Nodame Cantabile Best100'
                                           'title'  'Der Tanz in der Dorfschenke (Erster Mephisto - Walzer)'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'Q-PLAY-3', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', "
 "'Q-PIANO-4', 'q-chart-3', 'q-drums-1', 'q-other-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['piano', 'japanese', 'classical', 'classic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '11'
                                      'tracktotal'  '13'
                                            'date'  '1995'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '129.7'
                                             'key'  '12A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:iTunNORM:eng'                                 (' 00000113 00000118 00002C22 00003BCE 0008E10F 00023DAC 00007800 00007C88 '
 '00088400 00018492')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000B04 000000000201006C 00000000 011722C7 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '13+595198511ADF7BFFA2A746F152BB5AFA+8518241'
'TALB' (Album/Movie/Show title)                     'Nodame Cantabile Best100'
'TBPM' (BPM (beats per minute))                     '129.7'
'TCOM' (Composer)                                   'Lizst, Franz'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '1995'
'TENC' (Encoded by)                                 'iTunes v7.0.2.16'
'TIT2' (Title/songname/content description)         'Der Tanz in der Dorfschenke (Erster Mephisto - Walzer)'
'TKEY' (Initial key)                                '12A'
'TPE1' (Lead performer(s)/Soloist(s))               'Koyama Michie'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/8'
'TRCK' (Track number/Position in set)               '11/13'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['piano', 'japanese', 'classical', 'classic']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.70 dB'
'TXXX:replaygain_track_peak'                        '0.813847'

========================== row from database ==========================
                                              'id'  393582
                                            'path'  /data/Music/Bulk/00instruments-classical/Compilations/Nodame Cantabile Best100/1-11 Der Tanz in der Dorfschenke (Erster Mephisto - Walzer).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  762
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  18342723
                                           'mtime'  1620574146
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Compilations 11 prerock classical classical instruments
                                      'tag_artist'  Koyama Michie
                                     'tag_release'  Nodame Cantabile Best100
                                       'tag_title'  Der Tanz in der Dorfschenke (Erster Mephisto - Walzer)
                                             'bpm'  129.7
                                    'search_title'  'der':1 'dorfschenke':4 'erster':5,6 'in':3 'mephisto':7 'tanz':2 'walzer':8,9
                                   'search_artist'  'koyama':1 'michie':2
                                  'search_release'  'best100':3 'cantabile':2 'nodame':1
                                     'search_rest'  '00instruments':1 'classical':2 'compilations':3 'instruments':5 'prerock':4
                                    'search_combo'  '00instruments':15 'best100':14C 'cantabile':13C 'classical':16 'compilations':17 'der':1A 'dorfschenke':4A 'erster':5A,6A 'in':3A 'instruments':19 'koyama':10B 'mephisto':7A 'michie':11B 'nodame':12C 'prerock':18 'tanz':2A 'walzer':8A,9A
                                    'tag_tracknum'  11
                                      'num_images'  1
                                             'key'  12A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-1', 'Q-HAP-3', 'Q-PLAY-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['piano', 'japanese', 'classical', 'classic']
                                        'tag_date'  1995
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620574146.254354  (2021-05-09 17:29:06)
                             'size'  18342723