======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '160'
                                          'artist'  'Pyotr Ilyich Tchaikovsky'
                                     'text_people'  ''
                                         'release'  'Classical Masterworks'
                                           'title'  'The Nutcracker Suite, Op. 71a: IIa. Marche'
                                           '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-1', 'q-play-3', "
 "'q-chart-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['russian/composers/instrumental/romantic/classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  '16'
                                            'date'  '2006'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '133.8'
                                             'key'  '10A'
                                        'acoustid'  '62fa850a-eb83-4671-ba4f-a22b57412379'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Classical Masterworks'
'TBPM' (BPM (beats per minute))                     '133.8'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDOR' (Original release time)                      '2006'
'TDRC' (Recording time)                             '2006'
'TENC' (Encoded by)                                 'FreeRIP 2.90'
'TIT2' (Title/songname/content description)         'The Nutcracker Suite, Op. 71a: IIa. Marche'
'TKEY' (Initial key)                                '10A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Pyotr Ilyich Tchaikovsky'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '37/40'
'TPUB' (Publisher)                                  'Brilliant Classics'
'TRCK' (Track number/Position in set)               '10/16'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Tchaikovsky, Pyotr Ilyich'
'TSST' (Set subtitle)                               ('Pyotr Ilyitsch Tchaikovsky: Ballet Suites, Nutcracker - Swan Lake - Sleeping '
 'Beauty')
'TXXX:ASIN'                                         'B000HCPSCQ'
'TXXX:Acoustid Id'                                  '62fa850a-eb83-4671-ba4f-a22b57412379'
'TXXX:Artists'                                      'Pyotr Ilyich Tchaikovsky'
'TXXX:BARCODE'                                      '5028421931012'
'TXXX:CATALOGNUMBER'                                '93101/93101/1-40'
'TXXX:MusicBrainz Album Artist Id'                  '89ad4ac3-39f7-470e-963a-56509c546377'
'TXXX:MusicBrainz Album Id'                         '3473b369-a5bd-4799-8a8a-378d99480441'
'TXXX:MusicBrainz Album Release Country'            'NL'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
'TXXX:MusicBrainz Artist Id'                        '9ddd7abc-9e1b-471d-8031-583bc6bc8be9'
'TXXX:MusicBrainz Release Group Id'                 '2a227337-80bc-4314-97bf-6640c6e54ef9'
'TXXX:MusicBrainz Release Track Id'                 'ae40e9d4-2ce3-365a-94dd-7ebba0378b48'
'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:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   'russian/composers/instrumental/romantic/classical'
'TXXX:originalyear'                                 '2006'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.58 dB'
'TXXX:replaygain_track_peak'                        '0.930760'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'ef90c493-a478-486c-a9ea-4e125d0ccbab')

========================== row from database ==========================
                                              'id'  306776
                                            'path'  /data/Music/Bulk/00instruments-classical/Pyotr Ilyich Tchaikovsky/Classical Masterworks CD37/10 Nutcracker op.71a - II Marche.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  160
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  5172101
                                           'mtime'  1620561757
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical CD37 10 op.71a prerock classical classical instruments
                                      'tag_artist'  Pyotr Ilyich Tchaikovsky
                                     'tag_release'  Classical Masterworks
                                       'tag_title'  The Nutcracker Suite, Op. 71a: IIa. Marche
                                             'bpm'  133.8
                                    'search_title'  '71a':7,8 'iia':9,10 'marche':11 'nutcracker':2 'op':5,6 'suite':3,4 'the':1
                                   'search_artist'  'ilyich':2 'pyotr':1 'tchaikovsky':3
                                  'search_release'  'classical':1 'masterworks':2
                                     'search_rest'  '00instruments':1 '71a':5 'cd37':3 'classical':2 'instruments':8 'op':4 'op71a':6 'prerock':7
                                    'search_combo'  '00instruments':17 '71a':7A,8A,21 'cd37':19 'classical':15C,18 'iia':9A,10A 'ilyich':13B 'instruments':24 'marche':11A 'masterworks':16C 'nutcracker':2A 'op':5A,6A,20 'op71a':22 'prerock':23 'pyotr':12B 'suite':3A,4A 'tchaikovsky':14B 'the':1A
                                    'tag_tracknum'  10
                                      'num_images'  1
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-4', 'Q-JZFKS-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['russian/composers/instrumental/romantic/classical']
                                        'tag_date'  2006
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561757.1880922  (2021-05-09 14:02:37)
                             'size'  5172101