How to Get Song to Play on Multiple Instagram Story?

1. Use the Boomerang app to combine multiple video and audio pieces into one video. 

2. Upload the video to your Instagram story.

3. Go to the "Music" option in Instagram's Stories menu and select the track you want to add to the Boomerang video. 

4. The song will automatically play as the Boomerang video plays.

5. When you post the Boomerang video to your Instagram story, it will have the chosen soundtrack playing in the background.