Have you tested to see if this happens on other systems for you? Say a desktop and a laptop connected to the same ISP connection at home. Most often when I have guild-mates or party members complain about audio issues it is due to their personal user settings. Make sure that voice-chat is turned on even if you have no microphone, if you use a headset sometimes, and speakers other times, especially if the headset is USB or wireless, you will have to go in to your audio configurations and confirm that the game is looking for the correct device. If these suggestions do not easily help you, please let me know, I'll work up an audio configuration tutorial page on DDOwiki to help you. (I should make one anyways, but this may bump up it's priority ;-))