How to Import Music/Sound to the whole scene?

How am I supposed to import sounds that can go straight to my multiple scenes? I got like 23 scenes and I want to play sounds to them all since the sound itself is a background music.

*Im still using TBS8.

You can export your scenes individually (1 video file per scene), then combine them into your full movie in a video editor software (like iMovie for the Mac, and Movie Maker for Windows). You can add your soundtrack to your full movie in the video editor.