======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '569'
                                          'artist'  'Leonard Bernstein, New York Philharmonic Orchestra'
                                     'text_people'  'Beethoven, Ludwig Van'
                                         'release'  'Nodame Cantabile Best100'
                                           'title'  'Symphony #7 in A major, Op.92 - 3rd Movement'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['classical', 'nodame cantabile']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  '8'
                                            'date'  '1964'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '112.4'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:iTunNORM:eng'                                 (' 00000319 00000284 00005CE0 00003D9E 000357B6 000374E5 00007FFD 000081E0 '
 '00035F5E 00036B68')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000918 00000000017EE0D8 00000000 00D050FB 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '8+122876A7A83DAAA6B6E8CBE6F90BFAB2+8533759'
'TALB' (Album/Movie/Show title)                     'Nodame Cantabile Best100'
'TBPM' (BPM (beats per minute))                     '112.4'
'TCOM' (Composer)                                   'Beethoven, Ludwig Van'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '1964'
'TENC' (Encoded by)                                 'iTunes v7.0.2.16'
'TIT2' (Title/songname/content description)         'Symphony #7 in A major, Op.92 - 3rd Movement'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Leonard Bernstein, New York Philharmonic Orchestra'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '3/8'
'TRCK' (Track number/Position in set)               '3/8'
'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', 'nodame cantabile']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'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'                        '+2.41 dB'
'TXXX:replaygain_track_peak'                        '0.604161'

========================== row from database ==========================
                                              'id'  368960
                                            'path'  /data/Music/Bulk/00instruments-classical/Compilations/Nodame Cantabile Best100/3-03 Symphony #7 in A major, Op.92 - 3rd Movement.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  569
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  13701564
                                           'mtime'  1620561511
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Compilations 03 prerock classical classical instruments
                                      'tag_artist'  Leonard Bernstein, New York Philharmonic Orchestra
                                     'tag_release'  Nodame Cantabile Best100
                                       'tag_title'  Symphony #7 in A major, Op.92 - 3rd Movement
                                             'bpm'  112.4
                                    'search_title'  '3rd':11 '7':2,3 '92':9 'a':5 'in':4 'major':6,7 'movement':12 'op':8 'op92':10 'symphony':1
                                   'search_artist'  'bernstein':2,3 'leonard':1 'new':4 'orchestra':7 'philharmonic':6 'york':5
                                  'search_release'  'best100':3 'cantabile':2 'nodame':1
                                     'search_rest'  '00instruments':1 'classical':2 'compilations':3 'instruments':5 'prerock':4
                                    'search_combo'  '00instruments':23 '3rd':11A '7':2A,3A '92':9A 'a':5A 'bernstein':14B,15B 'best100':22C 'cantabile':21C 'classical':24 'compilations':25 'in':4A 'instruments':27 'leonard':13B 'major':6A,7A 'movement':12A 'new':16B 'nodame':20C 'op':8A 'op92':10A 'orchestra':19B 'philharmonic':18B 'prerock':26 'symphony':1A 'york':17B
                                    'tag_tracknum'  3
                                      '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-3', 'q-syn-1', 'q-chart-3', 'q-other-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['classical', 'nodame cantabile']
                                        'tag_date'  1964
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561510.9496467  (2021-05-09 13:58:30)
                             'size'  13701564