Sound cuts in and out when playing

When I open minecraft pe version 7.6.0 the sound still cuts in and out when breaking blocks,walking, killing mobs, etc.. All the time.

What I expected to happen was...:
It should play the sound fluently

What actually happened was...:
It cuts in and out every 2-3 minutes

Steps to Reproduce:
1. Open minecraft pe
2. Start playing
3. Remember to turn sound all the way up
4. Sound will cut in and out