Hey, that was me that replied to you. LOL. I did not give you the software coz I don't think it's right, that you need to pay just to voice command a music.
And most fortunately for you, I found out just NOW, you can use Cortana flawlessly!!! to voice play music files on your PC!!!! So go ahead and explore the awesomeness of Cortana. Hope you have a built in mic, if not hope you have an external mic.
Guys please forget Alexa if you want to voice command something from your PC. How in the world can you guys not know about Cortana?? Windows has its own AI, why in the world would you use another AI when Windows has a built in AI, which FYI is - Cortana(!) ? I don't get the logic in that..
Why are you people making it hard on yourselves?