Scroll down to see how to do this in Symphony 1.5
In Symphony 2.0:
Go to the settings gear in the nav bar. In, you can enable or disable urgent chat alerts as well as message sound (figure 1).
Figure 1 Notification settings in General
Set your desktop notifications (for desktop application only), sound type, external notifications, urgent chat alerts, and unread chat indicators in the Notifications section (figure 2).
Figure 2 Customizations in Notifications
Settings save automatically, so when you’re happy with your notifications, click the X in the top right.
In Symphony 1.5:
Go to Settings in your toolbar. Under Alerts, select the type of notifications you’d like to receive for rooms, IMs, and signals (Figure 1):
Figure 1 Alerts
You can also customize your sound notifications and set alert preferences for when you’re offline (Figure 2):
Figure 2 Offline Notifications
Settings save automatically, so when you’re happy with your notifications, click the X in the top right (Figure 3):
Figure 3 Close the Alerts window