Audio Input

Hi All,
I’ve purchased an Amazon Echo Dot, probably wont use it – more of a novelty item?

I need to hook the Echo up to my sound system as the Dot doesn’t have a speaker.

I’m currently using Kodi Ubuntu with TOSLink cable from my PC straight to a home cinema system.

I cant plug the echo into the home cinema system.

My thought is to plug the echo into the microphone slot on the pc and have it permanently active through kodi, so that I can hear the echo over the top of kodi.

Any way of doing this? I cant see any microphone options in kodi itself, and I’m a complete novice when it comes to Ubuntu.

Thanks.