If you want the forum to behave more like a chatroom, you can do that by changing your preferences.
The forum is real time. If you have a page open, and someone replies, the reply will appear immediately for everyone who is looking at that page. You can also see typing indicators when people are typing their replies in public threads and private messages.
First, go to your notification settings and enable “Live Notifications”. That will show a notification on your desktop or phone whenever someone replies to you.
If you want to hear a sound for each new forum post, go to this settings page and add the categories you want notifications for into the “Watched” box. It will look something like the image below. Don’t forget to click “Save Changes” at the bottom of the page, after you add your categories.
Then, just leave a tab open. Firefox and Chrome both let you “pin” a tab open by right-clicking on it.
This forum is also installable on mobile phones by using the “Add to Home Screen” option in some mobile browsers (Chrome, Firefox, and Opera). The forum will then send mobile notifications just like a chat app.