======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '261'
                                          'artist'  'Maebashi Teiko'
                                     'text_people'  'Bach, Johann Sebastian'
                                         'release'  'Nodame Cantabile Best100'
                                           'title'  'Partita for Violin Solo #2 in D minor, BWV1004 - 3. Sarabande'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  '8'
                                            'date'  '2006'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '140.3'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:iTunNORM:eng'                                 (' 000000CC 000000EE 00001B64 00001E51 00006400 00028C3E 00003673 00003EA4 '
 '00028C3E 00028C3E')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000894 0000000000AFD3DC 00000000 005FA273 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '8+75F50137D98862CA9C70B4B852340B86+8534152'
'TALB' (Album/Movie/Show title)                     'Nodame Cantabile Best100'
'TBPM' (BPM (beats per minute))                     '140.3'
'TCOM' (Composer)                                   'Bach, Johann Sebastian'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '2006'
'TENC' (Encoded by)                                 'iTunes v7.0.2.16'
'TIT2' (Title/songname/content description)         'Partita for Violin Solo #2 in D minor, BWV1004 - 3. Sarabande'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Maebashi Teiko'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '6/8'
'TRCK' (Track number/Position in set)               '8/8'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   'classical'
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.31 dB'
'TXXX:replaygain_track_peak'                        '0.691429'

========================== row from database ==========================
                                              'id'  295668
                                            'path'  /data/Music/Bulk/00instruments-classical/Compilations/Nodame Cantabile Best100/6-08 Partita for Violin Solo #2 in D minor, BWV1004 - 3. Sarabande.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  261
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  6316816
                                           'mtime'  1620561518
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Compilations 6 08 prerock classical classical instruments
                                      'tag_artist'  Maebashi Teiko
                                     'tag_release'  Nodame Cantabile Best100
                                       'tag_title'  Partita for Violin Solo #2 in D minor, BWV1004 - 3. Sarabande
                                             'bpm'  140.3
                                    'search_title'  '2':5,6 '3':12,13 'bwv1004':11 'd':8 'for':2 'in':7 'minor':9,10 'partita':1 'sarabande':14 'solo':4 'violin':3
                                   'search_artist'  'maebashi':1 'teiko':2
                                  'search_release'  'best100':3 'cantabile':2 'nodame':1
                                     'search_rest'  '00instruments':1 '6':4 'classical':2 'compilations':3 'instruments':6 'prerock':5
                                    'search_combo'  '00instruments':20 '2':5A,6A '3':12A,13A '6':23 'best100':19C 'bwv1004':11A 'cantabile':18C 'classical':21 'compilations':22 'd':8A 'for':2A 'in':7A 'instruments':25 'maebashi':15B 'minor':9A,10A 'nodame':17C 'partita':1A 'prerock':24 'sarabande':14A 'solo':4A 'teiko':16B 'violin':3A
                                    'tag_tracknum'  8
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['classical']
                                        'tag_date'  2006
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561518.169892  (2021-05-09 13:58:38)
                             'size'  6316816