Hey guys! I`m new here. I found this theme through web http://forums.cgarchitect.com/71729-where-do-you-get-really-free-legal-music-walkthroughs.html on your forum. Wanted to give my 5 cents, but the thread is closed, so I decided to open a new one.
Maybe I will help someone with this service. Despite, I am not familiar with architecture in depth, I know that music is playing essential role. I know there is a lot of different places for getting music for free or not.
But, I want to recommend you this guy https://www.acousticbro.com. You can find there music for commercial use as well as non-commercial (free). He has some interesting royalty free music and background music and for quite fair price.