ROC-RK3328-CC beeping continously. Normal?

Chip Platform Rockchip
1

The board beeps (softly) continuously. Though soft, it is very irritating. How do I stop it?

2

im not sure but see this
https://www.youtube.com/watch?v=JadID7eRTtQ&frags=pl%2Cwn

3

use this

https://github.com/ssvb/cpuburn-arm