As long as you credit the music as being made with this tool, I don't mind. You can export the output of your audio interface easily with a DAW or even by making a video capture with OBS Studio or something similar.
However, keep in mind that you will never have good adaptive music for your game with this process. By rendering the music like this, you make it linear, and it won't change in your game based in what is going on. So, you will lose all the advantages of having such a adaptative music system in the first place. That's why I was a bit confused by the request :)