Convert 7.1 HD sound to “normal” 5.1

I own a Nvidia Shield 2017 player with the latest SPMC installed on it.

I have some movies with DTS-HD and dolby true hd sound. My old receiver only supports 5.1 DD and DTS.

Does SPMC (or Kodi) have a possibility to “downgrade” the 7.1 DolbyDigital to DolbyDigital 5.1 and the DTS7.1 to DTS5.1

Thanks,
Gert