======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '158'
                                          'artist'  'Gene Vincent & His Blue Caps'
                                     'text_people'  ''
                                         'release'  'Greatest Hits'
                                           'title'  'Be-Bop-A-Lula'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['rock and roll', 'rock n roll', '50s', 'rockabilly', 'classic rock']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '047'
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '128.089'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

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'PRIV:AverageLevel:¦\x12\x00\x00'                   PRIV(owner='AverageLevel', data=b'\xa6\x12\x00\x00')
'PRIV:PeakValue:\x87~\x00\x00'                      PRIV(owner='PeakValue', data=b'\x87~\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 \x001\x007\x009\x006\x004\x007\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x005\x007\x006\x004\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x001\x000\x004\x006\x001\x009\x005\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x001\x007\x009\x006\x004\x007\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x005\x007\x006\x004\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x001\x000\x004\x006\x001\x009\x005\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:l¨ûKJëàE\x95M{æ8\x84ZÔ'  PRIV(owner='WM/WMCollectionGroupID', data=b'l\xa8\xfbKJ\xeb\xe0E\x95M{\xe68\x84Z\xd4')
'PRIV:WM/WMCollectionID:l¨ûKJëàE\x95M{æ8\x84ZÔ'     PRIV(owner='WM/WMCollectionID', data=b'l\xa8\xfbKJ\xeb\xe0E\x95M{\xe68\x84Z\xd4')
"PRIV:WM/WMContentID:\x0fWM³\x1bÓ\x9eI¯Õ\x8b'?\r\x0b>"  PRIV(owner='WM/WMContentID', data=b"\x0fWM\xb3\x1b\xd3\x9eI\xaf\xd5\x8b'?\r\x0b>")
'TALB' (Album/Movie/Show title)                     'Greatest Hits'
'TBPM' (BPM (beats per minute))                     '128.089'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         'Be-Bop-A-Lula'
'TKEY' (Initial key)                                '12B'
'TLEN' (Length)                                     '158373'
'TPE1' (Lead performer(s)/Soloist(s))               'Gene Vincent & His Blue Caps'
'TPUB' (Publisher)                                  'Curb'
'TRCK' (Track number/Position in set)               '047'
'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:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['rock and roll', 'rock n roll', '50s', 'rockabilly', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.29 dB'
'TXXX:replaygain_track_peak'                        '0.494446'

========================== row from database ==========================
                                              'id'  1445343
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1956/1956-047 - Gene Vincent & His Blue Caps - Be-Bop-A-Lula.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  158
                                           'genre'  prerock-unsorted
                                        'filesize'  6328502
                                           'mtime'  1621698257
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1956 1956 047 prerock unsorted
                                      'tag_artist'  Gene Vincent & His Blue Caps
                                     'tag_release'  Greatest Hits
                                       'tag_title'  Be-Bop-A-Lula
                                             'bpm'  128.089
                                    'search_title'  'a':3 'be':1 'bebopalula':5 'bop':2 'lula':4
                                   'search_artist'  'blue':4 'caps':5 'gene':1 'his':3 'vincent':2
                                  'search_release'  'greatest':1 'hits':2
                                     'search_rest'  '00oldiepop':5 '1956':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':7 'unsorted':8
                                    'search_combo'  '00oldiepop':17 '1956':18 'a':3A 'be':1A 'bebopalula':5A 'blue':9B 'bop':2A 'caps':10B 'country':16 'exotica':14 'gene':6B 'greatest':11C 'his':8B 'hits':12C 'jazz':13 'lula':4A 'oldies':15 'prerock':19 'unsorted':20 'vincent':7B
                                    'tag_tracknum'  47
                                      'num_images'  0
                                             'key'  12B
                                           '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-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['rock and roll', 'rock n roll', '50s', 'rockabilly', 'classic rock']
                                        'tag_date'  1956
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1621698257.2926464  (2021-05-22 17:44:17)
                             'size'  6328502