======================== unified (from filesystem) ========================
                                         'bitrate'  '189.84'
                                        'duration'  '394'
                                          'artist'  'Joseph Haydn'
                                     'text_people'  ''
                                         'release'  '100 Masterpieces, Volume 4: The Top 10 of Classical Music 1788-1810'
                                           'title'  'Symphony No. 94 in G major ("Surprise"), H. 1/94 2nd 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-1', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['classical', 'baroque', 'austrian', 'composers', 'classic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  '10'
                                            'date'  '1991'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '139'
                                             'key'  '4A'
                                        'acoustid'  '5a74056f-e2e2-4e92-827b-305380b57cf3'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '100 Masterpieces, Volume 4: The Top 10 of Classical Music 1788-1810'
'TBPM' (BPM (beats per minute))                     '139'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDOR' (Original release time)                      '1991'
'TDRC' (Recording time)                             '1991-03-19'
'TENC' (Encoded by)                                 'Exact Audio Copy   (Burst mode)'
'TIT2' (Title/songname/content description)         'Symphony No. 94 in G major ("Surprise"), H. 1/94 2nd movement'
'TKEY' (Initial key)                                '4A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Joseph Haydn'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'LaserLight Digital'
'TRCK' (Track number/Position in set)               '3/10'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Haydn, Joseph'
'TXXX:Acoustid Id'                                  '5a74056f-e2e2-4e92-827b-305380b57cf3'
'TXXX:Artists'                                      'Joseph Haydn'
'TXXX:BARCODE'                                      '018111567923'
'TXXX:CATALOGNUMBER'                                '15 679'
'TXXX:MusicBrainz Album Artist Id'                  '89ad4ac3-39f7-470e-963a-56509c546377'
'TXXX:MusicBrainz Album Id'                         'bf0d028e-bc94-4246-9dac-828475a6dc66'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
'TXXX:MusicBrainz Artist Id'                        'c130b0fb-5dce-449d-9f40-1437f889f7fe'
'TXXX:MusicBrainz Release Group Id'                 'b2512f5e-468a-4850-ba8a-2d4a46f70e25'
'TXXX:MusicBrainz Release Track Id'                 'cdf58616-3648-370d-a330-41ab14de27b9'
'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'                                   ['classical', 'baroque', 'austrian', 'composers', 'classic']
'TXXX:originalyear'                                 '1991'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'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'                        '+1.81 dB'
'TXXX:replaygain_track_peak'                        '0.900855'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'8852629f-ae3d-4f7a-9fe6-64b32bcd8a9c')

========================== row from database ==========================
                                              'id'  1497903
                                            'path'  /data/Music/Bulk/00instruments-classical/The Top 100 Masterpieces of Classical Music 1685-1928/Disc 4 - 1788-1810/03 - 1791 Haydn- Symphony No. 94, _Surprise_, 2nd movement.mp3
                                         'working'  None
                                         'bitrate'  189
                                    'duration_sec'  394
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  9461830
                                           'mtime'  1620561810
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 1685 1928 Disc 03 1791 94, _Surprise_, prerock classical classical instruments
                                      'tag_artist'  Joseph Haydn
                                     'tag_release'  100 Masterpieces, Volume 4: The Top 10 of Classical Music 1788-1810
                                       'tag_title'  Symphony No. 94 in G major ("Surprise"), H. 1/94 2nd movement
                                             'bpm'  139.0
                                    'search_title'  '1':12 '194':14 '2nd':15 '94':4,13 'g':6 'h':10,11 'in':5 'major':7 'movement':16 'no':2,3 'surprise':8,9 'symphony':1
                                   'search_artist'  'haydn':2 'joseph':1
                                  'search_release'  '100':1 '1788':12 '17881810':14 '1810':13 '4':5,6 'classical':10 'masterpieces':2,3 'music':11 'of':9 'the':7 'top':8 'volume':4
                                     'search_rest'  '00instruments':1 '1685':3 '1791':6 '1928':4 '94':7,8 'classical':2 'disc':5 'instruments':12 'prerock':11 'surprise':9,10
                                    'search_combo'  '00instruments':33 '1':12A '100':19C '1685':35 '1788':30C '17881810':32C '1791':38 '1810':31C '1928':36 '194':14A '2nd':15A '4':23C,24C '94':4A,13A,39,40 'classical':28C,34 'disc':37 'g':6A 'h':10A,11A 'haydn':18B 'in':5A 'instruments':44 'joseph':17B 'major':7A 'masterpieces':20C,21C 'movement':16A 'music':29C 'no':2A,3A 'of':27C 'prerock':43 'surprise':8A,9A,41,42 'symphony':1A 'the':25C 'top':26C 'volume':22C
                                    'tag_tracknum'  3
                                      'num_images'  1
                                             'key'  4A
                                           '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-JZFKS-1', 'q-busy-2', 'q-drums-3', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['classical', 'baroque', 'austrian', 'composers', 'classic']
                                        'tag_date'  1991
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561809.69981  (2021-05-09 14:03:29)
                             'size'  9461830