We're so sorry you are experiencing an issue with the sound in the app!
There are several things you can do to solve the problem you are experiencing:
- Verify your volume settings are set up correctly
- Be sure to update to the latest version
Additionally, if you have an iOS device:
- When accessing the app, please be sure to turn the Ring/Silent switch to ring
If your problem continues, please reach out to us at the Help 
widget on the lower right corner.