Can't Hear Notifications
The Curse App provides both visual and audio notifications for users. However, in the case it's not working for you we have a few common causes that may be causing it. So check these out.
This is specific for those who are not able to hear their notifications.
You will need to go into the Curse client, and head to the Settings. This is the cogwheel in the lower left corner of the client.
This will open up your Settings options. Click on the Notifications link.
First make sure you have SOUNDS option toggled on.
If you are logged into a game, and not getting sound notifications; also make sure that MUTE NOTIFICATION SOUND WHEN I'M PLAYING A GAME is toggled off.
Now check the specific types of notifications for being set to Always, Favorite Friends Only (note only people on your favorites will trigger the notification), or Enabled.
Also make sure if there is a sound notification the sound icon is toggled to green.
Scroll down through all the notifications to make sure all the sound notifications are set to your liking.
If you are in Streamer Mode and have your Streamer Mode set up to disable sound you won't hear any sounds.
Make sure you aren't in Streamer Mode or that you don't have that setting toggled on.
For an overview of the Streamer Mode options check out our guide.
Further Sound Solutions
We have a guide with some of the common issues prevent all sound, but you may also want to give them a try as well to see if one of those may also be the cause for you.