Please make sure the following instructions if you can't hear sound of the scenery.
Changing the volume on your app
Go to setting page by tapping an icon on lower right. Then, drug the slider to the right or left and try if you can hear any sound.
Restart Atmoph Window
If problem is not solved yet, remove AC adapter from the plug socket and restart Atmoph Window.
If you still have problem...
We are sorry for bothering you. Please contact us via e-mail at firstname.lastname@example.org