======================== unified (from filesystem) ========================
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                                        'duration'  '118'
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                                      'lastfmtags'  "['educational', 'nature', 'science', 'eductional', 'folk', 'edutainment']"
                             'musicbrainz_albumid'  ''
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                            'musicbrainz_artistid'  ''
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                                     'tracknumber'  '9'
                                      'tracktotal'  '14'
                                            'date'  '1963'
                                        'comments'  ''
                                           'genre'  'set-th-childrensmusic or educational'
                                             'bpm'  '148'
                                             'key'  '5B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:iTunNORM:eng'                                 (' 0000014B 00000174 00000494 000004FF 000186CE 000186CE 0000315B 000037B2 '
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'COMM:iTunes_CDDB_1:eng'                            'A00ED71C+285080+28+150+7120+16289+27382+39394+47570+58598+74070+88145+95246+103647+115426+123881+132567+144794+152571+161222+172016+180599+190267+197981+210099+222137+230990+240628+251845+259989+271028'
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'TCON' (Content type, a.k.a. Genre)                 'set-th-childrensmusic or educational'
'TDOR' (Original release time)                      '1963'
'TDRC' (Recording time)                             '1963'
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'TIT2' (Title/songname/content description)         'Why Is the Sky Blue'
'TKEY' (Initial key)                                '5B'
'TMED' (Media type)                                 '12" Vinyl'
'TPE1' (Lead performer(s)/Soloist(s))               'Marais & Miranda'
'TPE2' (Band/orchestra/accompaniment)               'Marais & Miranda'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Motivation Records'
'TRCK' (Track number/Position in set)               '9/14'
'TSO2'                                              'Marais & Miranda'
'TSOP' (Performer sort order)                       'Marais & Miranda'
'TXXX:Artists'                                      'Marais & Miranda'
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'TXXX:MusicBrainz Album Type'                       'album'
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'TXXX:MusicBrainz Release Track Id'                 'b38e76bb-d75c-37c4-8acf-9567581417a7'
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'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'                                   ['educational', 'nature', 'science', 'eductional', 'folk', 'edutainment']
'TXXX:originalyear'                                 '1963'
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'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
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========================== row from database ==========================
                                              'id'  973357
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/More Nature Songs/23 Why Is The Sky Blue_.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  118
                                           'genre'  set-th-childrensmusic or educational
                                        'filesize'  2390893
                                           'mtime'  1620526468
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm 23 The Blue_ set childrensmusic educational
                                      'tag_artist'  Marais & Miranda
                                     'tag_release'  More Nature Songs
                                       'tag_title'  Why Is the Sky Blue
                                             'bpm'  148.0
                                    'search_title'  'blue':5 'is':2 'sky':4 'the':3 'why':1
                                   'search_artist'  'marais':1 'miranda':2
                                  'search_release'  'more':1 'nature':2 'songs':3
                                     'search_rest'  '23':1 'blue':3 'childrensmusic':5 'educational':6 'set':4 'the':2
                                    'search_combo'  '23':11 'blue':5A,13 'childrensmusic':15 'educational':16 'is':2A 'marais':6B 'miranda':7B 'more':8C 'nature':9C 'set':14 'sky':4A 'songs':10C 'the':3A,12 'why':1A
                                    'tag_tracknum'  9
                                      'num_images'  1
                                             'key'  5B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', '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-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['educational', 'nature', 'science', 'eductional', 'folk', 'edutainment']
                                        'tag_date'  1963
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620526467.6962507  (2021-05-09 04:14:27)
                             'size'  2390893