======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '164'
                                          'artist'  ('Magdalena Hajossyova, Etc., Zdenek Kosler; Slovak Philharmonic Orchestra, '
 'Slovak Philharmonic Chorus')
                                     'text_people'  'Mozart'
                                         'release'  'Mozart: Requiem'
                                           'title'  'Mozart: Requiem In D Minor, K 626 - 2. Kyrie Eleison'
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                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  '14'
                                            'date'  '1989'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments;set-pl-sced'
                                             'bpm'  '143.8'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:iTunNORM:eng'                                 (' 0000017C 00000126 0000134D 00000979 0001376D 0001371F 000049D8 000038E1 '
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'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000804 00000000006E796C 00000000 003C1125 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '14+E119D3EE149175E25F467B55A7107EB7+937788'
'TALB' (Album/Movie/Show title)                     'Mozart: Requiem'
'TBPM' (BPM (beats per minute))                     '143.8'
'TCOM' (Composer)                                   'Mozart'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-classical or classical instruments', 'set-pl-sced']
'TDRC' (Recording time)                             '1989'
'TENC' (Encoded by)                                 'iTunes v7.6.1'
'TIT2' (Title/songname/content description)         'Mozart: Requiem In D Minor, K 626 - 2. Kyrie Eleison'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               ('Magdalena Hajossyova, Etc., Zdenek Kosler; Slovak Philharmonic Orchestra, '
 'Slovak Philharmonic Chorus')
'TPE2' (Band/orchestra/accompaniment)               ('Magdalena Hajossyova, Etc., Zdenek Kosler; Slovak Philharmonic Orchestra, '
 'Slovak Philharmonic Chorus')
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '2/14'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.43 dB'
'TXXX:replaygain_track_peak'                        '0.681089'

========================== row from database ==========================
                                              'id'  1477073
                                            'path'  /data/Music/Bulk/00instruments-classical/Hajossyova, Kosler; Slovak Philharmonic Orchestra, Slovak Philharmonic Chorus/02 Mozart_ Requiem In D Minor, K 626 - 2. Kyrie Eleison.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  164
                                           'genre'  prerock-classical or classical instruments;set-pl-sced
                                        'filesize'  3974789
                                           'mtime'  1636913616
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                                        'rest_str'   00instruments classical 02 Mozart_ prerock classical classical instruments;set pl sced
                                      'tag_artist'  Magdalena Hajossyova, Etc., Zdenek Kosler; Slovak Philharmonic Orchestra, Slovak Philharmonic Chorus
                                     'tag_release'  Mozart: Requiem
                                       'tag_title'  Mozart: Requiem In D Minor, K 626 - 2. Kyrie Eleison
                                             'bpm'  143.8
                                    'search_title'  '2':10,11 '626':9 'd':5 'eleison':13 'in':4 'k':8 'kyrie':12 'minor':6,7 'mozart':1,2 'requiem':3
                                   'search_artist'  'chorus':13 'etc':4,5 'hajossyova':2,3 'kosler':7,8 'magdalena':1 'orchestra':11,12 'philharmonic':10 'slovak':9 'zdenek':6
                                  'search_release'  'mozart':1,2 'requiem':3
                                     'search_rest'  '00instruments':1 'classical':2 'instruments':5,7 'mozart':3 'pl':9 'prerock':4 'sced':10 'set':6,8
                                    'search_combo'  '00instruments':30 '2':10A,11A '626':9A 'chorus':26B 'classical':31 'd':5A 'eleison':13A 'etc':17B,18B 'hajossyova':15B,16B 'in':4A 'instruments':34,36 'k':8A 'kosler':20B,21B 'kyrie':12A 'magdalena':14B 'minor':6A,7A 'mozart':1A,2A,27C,28C,32 'orchestra':24B,25B 'philharmonic':23B 'pl':38 'prerock':33 'requiem':3A,29C 'sced':39 'set':35,37 'slovak':22B 'zdenek':19B
                                    'tag_tracknum'  2
                                      'num_images'  1
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1989
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636913616.132897  (2021-11-14 19:13:36)
                             'size'  3974789