======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '168'
                                          'artist'  'Mitch Miller'
                                     'text_people'  ''
                                         'release'  'Greatest Hits [Columbia/Legacy]'
                                           'title'  "The Children's Marching Song (Nick Nack Paddy Whack)"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-3', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'soundtrack', 'oldies', 'easy listening']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  ''
                                            'date'  '1959'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '97.459'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         '59-128 POS 16'
'COMM:ID3v1 Comment:XXX'                            '59-128 POS 16'
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'PRIV:PeakValue:´j\x00\x00'                         PRIV(owner='PeakValue', data=b'\xb4j\x00\x00')
'PRIV:WM/MediaClassPrimaryID:¼}`Ñ#ãâK\x86¡H¤*(D\x1e'  PRIV(owner='WM/MediaClassPrimaryID', data=b'\xbc}`\xd1#\xe3\xe2K\x86\xa1H\xa4*(D\x1e')
'PRIV:WM/MediaClassSecondaryID:\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'  PRIV(owner='WM/MediaClassSecondaryID', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
'PRIV:WM/Provider:A\x00M\x00G\x00\x00\x00'          PRIV(owner='WM/Provider', data=b'A\x00M\x00G\x00\x00\x00')
'PRIV:WM/UniqueFileIdentifier:A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x003\x009\x008\x000\x002\x004\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x001\x003\x006\x007\x009\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x002\x005\x002\x004\x006\x002\x006\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x003\x009\x008\x000\x002\x004\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x001\x003\x006\x007\x009\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x002\x005\x002\x004\x006\x002\x006\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:¥\x93\x85a7\x86QB¯i\x0b\x1fø\x15û\x91'  PRIV(owner='WM/WMCollectionGroupID', data=b'\xa5\x93\x85a7\x86QB\xafi\x0b\x1f\xf8\x15\xfb\x91')
'PRIV:WM/WMCollectionID:¥\x93\x85a7\x86QB¯i\x0b\x1fø\x15û\x91'  PRIV(owner='WM/WMCollectionID', data=b'\xa5\x93\x85a7\x86QB\xafi\x0b\x1f\xf8\x15\xfb\x91')
"PRIV:WM/WMContentID:\x1cª\x94m\x7fiÈM\x98[©\x8d(*i'"  PRIV(owner='WM/WMContentID', data=b"\x1c\xaa\x94m\x7fi\xc8M\x98[\xa9\x8d(*i'")
'TALB' (Album/Movie/Show title)                     'Greatest Hits [Columbia/Legacy]'
'TBPM' (BPM (beats per minute))                     '97.459'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1959'
'TIT2' (Title/songname/content description)         "The Children's Marching Song (Nick Nack Paddy Whack)"
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '168466'
'TPE1' (Lead performer(s)/Soloist(s))               'Mitch Miller & His Orch. & Chorus'
'TPE2' (Band/orchestra/accompaniment)               'Mitch Miller'
'TPUB' (Publisher)                                  'Columbia/Legacy'
'TRCK' (Track number/Position in set)               '10'
'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:lastfmtags'                                   ['instrumental', 'soundtrack', 'oldies', 'easy listening']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.13 dB'
'TXXX:replaygain_track_peak'                        '0.490796'

========================== row from database ==========================
                                              'id'  1518890
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1959/59-128 - Mitch Miller & His Orch. & Chorus - The Children_s Marching Song (Nick Nack Paddy Whack).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  168
                                           'genre'  prerock-unsorted
                                        'filesize'  6739840
                                           'mtime'  1621698400
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1959 59 128 & His Orch. & Chorus Children_s prerock unsorted
                                      'tag_artist'  Mitch Miller
                                     'tag_release'  Greatest Hits [Columbia/Legacy]
                                       'tag_title'  The Children's Marching Song (Nick Nack Paddy Whack)
                                             'bpm'  97.459
                                    'search_title'  'children':2 'childrens':4 'marching':5 'nack':9 'nick':7,8 'paddy':10 's':3 'song':6 'the':1 'whack':11,12
                                   'search_artist'  'miller':2 'mitch':1
                                  'search_release'  'columbia':3 'columbialegacy':5 'greatest':1 'hits':2 'legacy':4
                                     'search_rest'  '00oldiepop':5 '128':8 '1959':6 '59':7 'children':13 'chorus':12 'country':4 'exotica':2 'his':9 'jazz':1 'oldies':3 'orch':10,11 'prerock':15 's':14 'unsorted':16
                                    'search_combo'  '00oldiepop':24 '128':27 '1959':25 '59':26 'children':2A,32 'childrens':4A 'chorus':31 'columbia':17C 'columbialegacy':19C 'country':23 'exotica':21 'greatest':15C 'his':28 'hits':16C 'jazz':20 'legacy':18C 'marching':5A 'miller':14B 'mitch':13B 'nack':9A 'nick':7A,8A 'oldies':22 'orch':29,30 'paddy':10A 'prerock':34 's':3A,33 'song':6A 'the':1A 'unsorted':35 'whack':11A,12A
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  6A
                                           '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-3', 'q-syn-1', 'q-chart-1', 'q-other-1', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['instrumental', 'soundtrack', 'oldies', 'easy listening']
                                        'tag_date'  1959
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698399.8879445  (2021-05-22 17:46:39)
                             'size'  6739840