======================== unified (from filesystem) ========================
                                         'bitrate'  '201.725'
                                        'duration'  '620'
                                          'artist'  'Franz Liszt'
                                     'text_people'  ''
                                         'release'  '100 Masterpieces, Volume 6: The Top 10 of Classical Music 1842-1853'
                                           'title'  'Hungarian Rhapsody No. 2'
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                                      'lastfmtags'  "['composers', 'piano', 'hungarian', 'romantic', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  '10'
                                            'date'  '1991'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '140'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '100 Masterpieces, Volume 6: The Top 10 of Classical Music 1842-1853'
'TBPM' (BPM (beats per minute))                     '140'
'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)         'Hungarian Rhapsody No. 2'
'TKEY' (Initial key)                                '4A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Franz Liszt'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'LaserLight Digital'
'TRCK' (Track number/Position in set)               '5/10'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Liszt, Franz'
'TXXX:Artists'                                      'Franz Liszt'
'TXXX:BARCODE'                                      '018111568128'
'TXXX:CATALOGNUMBER'                                '15 681'
'TXXX:MusicBrainz Album Artist Id'                  '89ad4ac3-39f7-470e-963a-56509c546377'
'TXXX:MusicBrainz Album Id'                         'eab70d73-bc28-4aa0-ba9c-3defbe436b74'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
'TXXX:MusicBrainz Artist Id'                        '2cd475bb-1abd-40c4-9904-6d4b691c752c'
'TXXX:MusicBrainz Release Group Id'                 '4f66013b-1dfc-4b91-bc12-c1d05a32bc15'
'TXXX:MusicBrainz Release Track Id'                 '8c918dbc-dc02-3979-bcba-88c5f385de55'
'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'                                   ['composers', 'piano', 'hungarian', 'romantic', 'classical']
'TXXX:originalyear'                                 '1991'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'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'                        '+2.33 dB'
'TXXX:replaygain_track_peak'                        '0.967452'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'8cb5aeae-9983-403a-b260-2ede9887053d')

========================== row from database ==========================
                                              'id'  1214181
                                            'path'  /data/Music/Bulk/00instruments-classical/The Top 100 Masterpieces of Classical Music 1685-1928/Disc 6 - 1842-1853/05 - 1847 Liszt - Hungarian Rhapsody No.2.mp3
                                         'working'  None
                                         'bitrate'  201
                                    'duration_sec'  620
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  15739920
                                           'mtime'  1620561810
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 1685 1928 Disc 05 1847 No.2 prerock classical or classical instruments
                                      'tag_artist'  Franz Liszt
                                     'tag_release'  100 Masterpieces, Volume 6: The Top 10 of Classical Music 1842-1853
                                       'tag_title'  Hungarian Rhapsody No. 2
                                             'bpm'  140.0
                                    'search_title'  '2':5 'hungarian':1 'no':3,4 'rhapsody':2
                                   'search_artist'  'franz':1 'liszt':2
                                  'search_release'  '100':1 '1842':12 '18421853':14 '1853':13 '6':5,6 'classical':10 'masterpieces':2,3 'music':11 'of':9 'the':7 'top':8 'volume':4
                                     'search_rest'  '00instruments':1 '1685':3 '1847':6 '1928':4 '2':8 'classical':2 'disc':5 'instruments':12 'no':7 'no2':9 'or':11 'prerock':10
                                    'search_combo'  '00instruments':22 '100':8C '1685':24 '1842':19C '18421853':21C '1847':27 '1853':20C '1928':25 '2':5A,29 '6':12C,13C 'classical':17C,23 'disc':26 'franz':6B 'hungarian':1A 'instruments':33 'liszt':7B 'masterpieces':9C,10C 'music':18C 'no':3A,4A,28 'no2':30 'of':16C 'or':32 'prerock':31 'rhapsody':2A 'the':14C 'top':15C 'volume':11C
                                    'tag_tracknum'  5
                                      '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-2', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['composers', 'piano', 'hungarian', 'romantic', 'classical']
                                        'tag_date'  1991
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561809.7096336  (2021-05-09 14:03:29)
                             'size'  15739920