It should be noted that this is a rather old registry hack. The voice will work just fine but internally, they no longer have the name "Mobile" in the title. It won't cause problems but it may feel a bit inconsistent.

This will make it work with sapi, which is laggy, if you're OK with the sapi lag, then its good for you. Also, remember that if this is the reg hack I think it is, it will be using the mobile voices which do not have the same quality that you get with cortana. It sounds like cortana, just compacted, similar to how some other voices offer enhanced or premium high and normal or compact.

@John Yeah, you need to import them in to the 32 bit registry for NVDA to see it, since NVDA's SAPI implementation is 32 bit. You can access this at c:\windows\syswow64\regedit.exe, or if you like the command line, you can also import them by typing "reg import filename.reg /reg:32" from an elevated command prompt. to make this easier, I created a registry hack that allows you to import a registry entry in to the 32 bit registry from the context menu for reg files. Note that it requires nircmd to be in the windows folder to work properly, I tried to use the graphical 32 bit registry and it broke every time a path included spaces, and nircmd is required because I couldn't find any other way to elevate the reg command so it can modify the registry. You can download the hack here. @ironcross32, I believe the higher quality Cortana voice is a cloud product, possibly because it might be using a neural network that's CPU intensive.