If your game is going to be free, I suggest the audio section at New Grounds.com. They have a vast audio section of free to use music for animations, games, etc. I'd personally avoid any video game or well known-covers, though.

If you ever get to the point where you want to sell the game commercially, you then have the option of getting in contact with the author of the piece to work out an arrangement.

This is just how I personally gather music. There are tons of sites out there providing music for non-commercial and commercial use.


(I put a space in there due to the Steam forums having the site having a leftover censor from back in the day where the site was riddled with inappropriate ads. The site is good to go.)

Perhaps you should take this guy in your contact list; he didn't just do electronics

https://steamhost.cn/steamcommunity_com/app/220700/discussions/0/540744299903902559/

When he posted he seemed to be searching for a challenge.

Three words, Imcopmtech is awesome!
Royalty free and completely free music fitting almost every genre you could think of.
You have to do a lot of searching but there's a lot of high quality tracks.

Got tons of 8bit music. Just let me know if any of my tracks can help raise the awesomeness for your game ;).

http://www.audiosauna.com/studio/